Question

find the exterior angles ACD. ​

Answer 1

Step-by-step explanation:

let the angles a and c be x

then we use the properties sum of angle of triangle equals to 180

X + X + 90 equals to 180 degree

2 X + 90 equal to 180 degree

2 X equals to 180 - 90 degree

2 X equal to 90 degree

X equal to 90 by 2

X equal to 45 degree

so the angles a and c are 45 degree

then we use the property exterior angle property of triangle

angle ACD= angle a + angle b

angle ACD equal to 90 + 45

angle ACD equal to 135

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