Question

Here is a rhombus.
Diagram not drawn to scale
80°
A straight line joining the midpoints of two of its sides is drawn.

Answer 1

Answer:

130 degrees

Step-by-step explanation:

The right top triangle is isosceles, so the supplementary angle of angle α is (180 - 80)/2 = 50 degrees.

Therefore, α = 180 - 50 = 130 degrees.