Question

9. The measure of the angleC of a triangle
ABC is 63 degree .What is the measure of
the exterior angle at C ?​

Answer 1

Answer:

117

Step-by-step explanation:

as we know sum of angle of a tringle =180 degree but also angle substanded between triangle and the plane is 180 so

180-63= external anglec

hence proved

Answer 2

Answer:

$< c = 63 \: degree$

$angle \: acb \: + \: exterior \: angle = 180$

$63 + x = 180(linear \: pair)$

$x = 180 - 63 \\ x = 117$

so the exterior angle c is 117

hope it's helpful