The first one can be proven by graphing the parallelogram and the diagonals.
The measure of angle 2 is 160 because it is a vertical angle to angle 1. The measure of angle 3 is 10 because the two other angles must each be 10 in order for the sum of all three angles to equal 180 for the triangles.
I have no idea for the third one however.
Hope this helps!
The measure of angle 2 is 160 because it is a vertical angle to angle 1. The measure of angle 3 is 10 because the two other angles must each be 10 in order for the sum of all three angles to equal 180 for the triangles.
I have no idea for the third one however.
Hope this helps!