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196 reviewed resources for Direct proof

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Ancient Egypt | What Everyday Life Was Actually Like Video
9:28
Ancient Egypt | What Everyday Life Was...
Biography of Mary Cassatt for Kids: Famous Artists for Children - FreeSchool Video
4:59
Biography of Mary Cassatt for Kids: Famous...
Language and Creativity Video
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Language and Creativity
Other Resource Types (196)
EngageNY

EngageNY Grade 5 ELA Module 2b, Unit 2: Case Study: The Boy Who Invented TV: The Story of Philo Farnsworth

For Teachers 5th Standards
In Unit 2, students continue to build their reading and writing skills and their understanding of how new or improved technologies are developed to meet the needs of society through a case study of Philo Farnsworth, the inventor of...
1 In 1 Collection
Lesson Planet

Vertical Angles Proof Samples

For Teachers 7th - 10th Standards
This visual, manipulative-based format for teaching geometric proofs nicely scafolds learners' development of mathematical reasoning and proof skills. This sample represents a proof of the congruence of vertical angles in four formats;...
Lesson Planet

Euclidean Direct Proofs

For Teachers 9th - 10th
Learning how to prove theorems in geometry can be challenging. This resource explains what a proof is, and the different styles for proofs. It also contains links to web-based practice problems that help guide learners though example...
Lesson Planet

Proof

For Students 9th - 12th Standards
Scholars learn how to write number theory proofs by viewing a video reviewing techniques for proofs on divisibility, parity, and consecutive integers. They then write proofs for a handful of conjectures on a worksheet.
1 In 1 Collection
EngageNY

Informal Proofs of Properties of Dilations

For Teachers 8th Standards
Challenge the class to prove that the dilation properties always hold. The lesson develops an informal proof of the properties of dilations through a discussion. Two of the proofs are verified with each class member performing the...
Lesson Planet

Proof of the Pythagorean Theorem Using Transformations

For Teachers 9th - 12th Standards
Middle and high schoolers construct a triangle using Cabri Jr. They construct squares on each of the legs and hypotenuse of the triangle. Pupils show that the area of the squares on the leg equal the area of the square on the hypotenuse.
Lesson Planet

Geometric Figures

For Teachers 10th - 12th Standards
Logical thinking is at the forefront of this jam-packed lesson, with young mathematicians not only investigating geometric concepts but also how they "know what they know". Through each activity and worksheet, learners wrestle with...
Lesson Planet

Indirect Proof and Inequalities in one Triangle

For Teachers 10th
In this geometry worksheet, 10th graders complete an indirect proof and order the sides or angles of a triangle. Also, students determine if a triangle can have sides with the given lengths. The two page worksheet contains twelve...
Lesson Planet

Coordinate Proofs

For Students 8th - 11th Standards
How do you know you know? Prove it! The guide goes through several examples and includes a link to a video to teach learners how to work through coordinate proofs. The goal is to prove that different shapes are indeed that shape. 
1 In 1 Collection
Lesson Planet

Conjectures and Proof

For Students 9th - 12th Standards
Transform proofs using triangle rotations. By rotating a triangle around various points, class members develop proofs. Participants prove relationships of alternative interior angles formed by parallel lines and the sum of the interior...
Lesson Planet

Proving Angles Congruent and Developing Proofs

For Teachers 9th - 12th Standards
Students explore the concept of angles.  For this angles lesson, students determine the relationships of vertical, complementary, supplementary, and adjacent angles.  Students construct proofs using their Ti-Nspire about vertical angles...
1 In 1 Collection
Lesson Planet

Right Triangles Inscribed in Circles I

For Teachers 9th - 10th Standards
One of the basic properties of inscribed angles gets a triangle proof treatment in a short but detailed exercise. Leading directions take the learner through identifying characteristics of a circle and how they relate to angles and...
Lesson Planet

How Much Proof Do We Need?

For Teachers 9th - 12th Standards
Are two angles enough? Given two triangles, the class determines through the definition of similarity and transformations whether the two triangles are similar. Provided with pairs of triangles and measurements, small groups find out...
Lesson Planet

Why do Stars Rise in the East?

For Students 8th - 10th
In this stars rise in the east activity, students use geometry to show how the Earth rotates from west to east and why celestial bodies appear to rise in the east and set in the west. Students draw a figure and label given points in...
Lesson Planet

Direct Object Pronouns

For Students 4th - 6th
In this direct object pronouns worksheet, students read sentences and identify direct objects, then change the direct objects to pronouns. Students determine seventeen answers.
Lesson Planet

Diagonally Half of Me!

For Teachers 9th - 12th Standards
Cut straight to the proof. Given cutouts of different quadrilaterals, pupils draw diagonals. Learners cut up the figures along the diagonals to see whether they bisect each other. Scholars develop a geometric proof for the property they...
2 In 2 Collections
Lesson Planet

Shortest Line Segment from a Point P to a Line L

For Teachers 9th - 11th Standards
One of the hardest skills for many young geometers to grasp is to move beyond just declaring obvious things true, and really returning to fundamental principles for proof. This brief exercise stretches those proving muscles as the class...
Lesson Planet

Company Logo

For Teachers 9th - 11th Standards
Modern advertising takes a geometric turn with this unit. The final assessment activity leads pupils through the logical analysis of a fictional logo, including the development of a paragraph proof. The wealth of resources leading up to...
Lesson Planet

Angles and Sides, Sides and Angles

For Teachers 10th - 12th Standards
Lead by example. Pupils use software to investigate given measures of sides and angles to determine whether they create congruent triangles. Using the discovered triangle congruences, learners put together proofs.
Lesson Planet

Analytic Geometry Study Guide

For Students 9th - 12th Standards
Are you looking for a comprehensive review that addresses the Common Core standards for geometry? This is it! Instruction and practice problems built specifically for standards are included. The material includes geometry topics from...
1 In 1 Collection
Lesson Planet

Equal Area Triangles on the Same Base II

For Teachers 9th - 12th Standards
A deceptively simple question setup leads to a number of attack methods and a surprisingly sophisticated solution set in this open-ended problem. Young geometers of different strengths can go about defining the solutions graphically,...
Lesson Planet

From Hypothesis to Conclusion...Reading Maps to Understand Proofs

For Teachers 10th
Tenth graders explore the concept of proof. In this proof instructional activity, 10th graders work in groups to collectively write proofs for directions to places on a map. Students give directions to specific places in big cities such...
Lesson Planet

Pre-Proof Warm-Ups

For Students 10th
In this pre-proofs activity, 10th graders solve and complete 10 different problems that include various proofs and their definitions. They use the diagram shown and the given information to write the direct conclusion for each case....
Lesson Planet

Proofs

For Students 10th
In this proofs worksheet, 10th graders solve and graph 8 different equations. First, they prove that each triangle is either congruent or similar. Then, students use the concept of corresponding parts of congruent triangles to solve each...