Question

If AB = CA and m1 = 45°, what is m3?

A.
47°
B.
45°
C.
43°
D.
90°

Answer 1

B 45 degrees

Explanation:

if AB and CA are = the M2 = 90 degrees

in an right triangle ware one angle is 90 degrees and one is 45 degrees the outer one will be 45 degrees

the total of the angles in a triangle is 180 degrees so 180 - 90 = 90

90 - 45 = 45

so the remaining angle is 45.