UNIT 1 LESSON 3 ISOSCELESEQUILATERAL TRIANGLES OBJECTIVE Use

UNIT 1 LESSON 3 ISOSCELES/EQUILATERAL TRIANGLES

OBJECTIVE Use properties of isosceles triangles to find missing measurements Use properties of equilateral triangles to find missing measurements

CLASSIFYING TRIANGLES Triangles can be classified by their sides AND by their angles SIDES Equilateral: Isosceles: Scalene:

CLASSIFYING TRIANGLES Acute: Obtuse: Right:

CLASSIFYING TRIANGLES Classify each triangle by its angles AND sides a) b) c) d)

What is an Isosceles Triangle?

ISOSCELES TRIANGLE More specifically, an Isosceles Triangle has two congruent sides (or legs) AND congruent base angles

ISOSCELES TRIANGLE •

2. In order for a game console controller to work correctly, users must first calibrate the system. The user stands with the controller in front of the system and allows the system to recognize the controller’s location. Optimal performance is achieved when an isosceles triangle, is created. Scarlett and Wren have calibrated their game controllers as shown in the diagram. Did either of them calibrate their controller correctly? Explain your reasoning. 15 ft 46°

What is an Equilateral Triangle?

Equilateral Triangles: All sides are congruent AND all angles are congruent. What is the measurement of each angle?

4. Find the values of x and y x= y=

OBJECTIVE Use properties of isosceles triangles to find missing measurements Use properties of equilateral triangles to find missing measurements