5.1 Angles in a Triangle. C-25 The sum of the measures of the __________ angles in a triangle is _.

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Presentation transcript:

5.1 Angles in a Triangle

C-25 The sum of the measures of the ________________ angles in a triangle is _______.

Find the missing angle of the following triangle. 37 o 68 o x

C-26 If two angles of one triangle are equal in measure to two angles of another triangle, then the third angle in each triangle is ___________ in measure to the third ___________ in the other _____________. Draw a picture to show this.

87 o 43 O

118 o 72 o 56 o 41 o 40 o a cb d a = ______ b = ______ c = ______ d = ______

C-27 If a triangle is isosceles, then its base angles are congruent Draw a picture to show this.

C-28 If a triangle has two congruent angles, then it is an isosceles triangle. Draw a picture to show this.

C-29 An equilateral triangle is equiangular, and, conversely, an equiangular triangle is equilateral. Draw a picture to show this.

Find the missing angle. 85 o 55 o x

Find the value for y 70 o x y

Find the value for x 70 o x y

Find the value of y. 36 o x y

Find the value of x. 64 o x y

Find the value of y. 64 o x y

Find the measures of the following angles. 50 o f e d c ba

Example- Translate the triangle below according to the given rule.

Homework 5.2 p. 235 #1-10, 15, 19-21