Find the measure of the angle and please explain step by step

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(1) Answers

lilchop06

angle 4 is the same as angle 8 angle 7 & angle 8 has to equal 180 degree so angle 7 and angle 4 also have to equal 180angle 4 is 3 times the size of 7lets call 7 (x)so 4(x) = 180180/4 =45x=45angle 7 is 45 degrees