Mathematics
Grade9
Easy

Question

The measure of angle A B C  is ______.

  1. 113o
  2. 67o
  3. 180o
  4. 133o

hintHint:


To find angleABC first we need to find angleDBF because both are vertically opposite angle. As DC is parallel to GE and AH is the transversal. So, The sum of angleDBF and angleBFG will be 180degree because of consecutive interior angle.

The correct answer is: 113o


    The measure of angle A B C  is _113degree_____.

    APQ, DC is parallel to GE, AH is the transversal.
    So, angle D B F plus angle B F G equals space 180 degree space left parenthesis c o n s e c u t i v e space i n t e r i o r space a n g l e right parenthesis
    rightwards double arrow angle D B F plus 67 degree equals 180 degree
rightwards double arrow angle D B F equals 180 degree minus 67 degree
rightwards double arrow angle D B F equals 113 degree
    Now ,angle A B C equals angle D B F space left parenthesis v e r t i c a l l y space o p p o s i t e space a n g l e right parenthesis
    rightwards double arrow angle A B C equals 113 degree

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