Question

I could really use your help , 25 POINTS!!

Answer 1

since line AB and CD make all right angles (given) angles 6+7+8 will equal 90 degrees.

According to the verticle angles rule:

angle 2 is equal to angle 6

angle 3 is equal to angle 7

angle 4 is equal to angle 8.

which proves that angle 2+4+7=90 degrees