'Base angles theorem' presentation slideshows

Chapter 4 Review

Chapter 4 Review. Start Game. Solve for x,y. Triangle Inequalities. Pythagorean Theorem & Distance. Classify Triangles. Medians of Triangles. $1. $1. $1. $1. $1. $2. $2. $2. $2. $2. $5. $5. $5. $5. $5. $10. $10. $10. $10. $10. $20. $20. $20. $20. $20.

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Geometry: 5 Triangle Theorems

Geometry: 5 Triangle Theorems. MathScience Innovation Center B. Davis. What are we studying?. 3 kinds of special triangles right triangles equilateral triangles isosceles triangles and their special properties. Why should we study these triangles and their properties?.

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Isosceles and Equilateral Triangles

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4.1 Triangles & Angles

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Warm Up

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Use isosceles and equilateral triangles

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4.7 Use Isosceles & Equilateral Triangles

4.7 Use Isosceles & Equilateral Triangles. Objectives. Use properties of isosceles triangles Use properties of equilateral triangles. Properties of Isosceles Triangles. The ? formed by the ? sides is called the vertex angle .

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Warm Up

Use Isosceles and Equilateral Triangles. Warm Up. Lesson Presentation. Lesson Quiz. equilateral. scalene. ANSWER. ANSWER. isosceles. ANSWER. Warm-Up. Classify each triangle by its sides. 1. 2 cm, 2 cm, 2 cm. 2. 7 ft, 11 ft, 7 ft. 3. 9 m, 8 m, 10 m.

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Geometry

Geometry. 4.6: Isosceles and Equilateral Triangles. The two angles in an isosceles triangle adjacent to the base of the triangle are called base angles . The angle opposite the base is called the vertex angle . Vertex Angle. Base Angle. Base Angle. Base Angles Theorem.

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Congruent Triangles in the World

Congruent Triangles in the World. By Sierra Smith. Anna Johnson is going on a trip with her family traveling all around the world! What triangles will she see in different countries and cities of the world?. 4.1 Triangles and Angles: Hong Kong.

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Chapter 4.6

Chapter 4.6. Isosceles, Equilateral, and Right Triangles. Objectives/Assignment. Use properties of isosceles and equilateral triangles Use properties of right triangles Assignment: 1-25 all. Goal 1: Using Properties of Isosceles Triangles.

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Section 4.6 Isosceles, Equilateral and Right Triangles

Section 4.6 Isosceles, Equilateral and Right Triangles. Review: Ways to Prove Triangles are Congruent. SSS Congruence Postulate SAS Congruence Postulate ASA Congruence Postulate AAS Congruence Theorem. NEW: Way to Prove Triangles are Congruent. H -L Congruence Theorem

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EXAMPLE 1

o. o. o. Find hypotenuse length in a 45-45-90 triangle. a. a. By the Triangle Sum Theorem, the measure of the third angle must be 45 . Then the triangle is a 45-45-90 triangle, so by Theorem 7.8 , the hypotenuse is 2 times as long as each leg. o. o. o. o. o. o. o.

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4-5 Isosceles and Equilateral Triangles

4-5 Isosceles and Equilateral Triangles. Isosceles Triangles. The congruent sides of an isosceles triangle are its legs . The third side is the base . The legs form the vertex angle . The other two angles are the base angles . Isosceles Triangle Theorems.

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EXAMPLE 3

ALGEBRA. Find the values of x and y in the diagram. STEP 1. Find the value of y . Because KLN is equiangular, it is also equilateral and KN KL . Therefore, y = 4 . STEP 2.

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Chapter 4.7 Notes: Use Isosceles and Equilateral Triangles

Chapter 4.7 Notes: Use Isosceles and Equilateral Triangles. Goal: You will use theorems about isosceles and equilateral triangles. . When an isosceles triangle has exactly two congruent sides, these two sides are called the legs . The angle formed by the legs is the vertex angle .

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Isosceles and Equilateral Triangles

Isosceles and Equilateral Triangles. Recall that an isosceles triangle is a triangle with at least two congruent sides The two congruent sides of an isosceles triangle are called the legs The base of an isosceles triangle is the third side

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