Question

If the figure above is a rhombus. If <1=42, then what does
<3 = ________
How do you know?

Answer 1

?

Answer 2

<3 = 138°. This can be determined by using the fact that opposite angles of a rhombus are equal. Since <1 = 42°, then <3 must be equal to 180° - 42° = 138°.