Graded assignment: grade 7 checkpoint 3 - part 2

Supplementary: Angle BDC (the straight line in the middle) and Angle BDA (the one with the 80 on it that is in the top right corner)

Complimentary: Angle AD (the straight line on top) and Angle BDA (the one with the 80 on it that is in the top right corner)

Supplementary angles are the ones that add up to 180 degrees, and Complimentary angles are the ones that add up to 90 degrees.

The way I remember that is that 90 comes before 180 in the numeric alphabet and C comes before S in the letter alphabet.

Step-by-step explanation:

angle c is 180 - 80 + 48= 52 degree

angle a is 90 - angle c ( linear pair )

= 90 - 52 = 38

angle b = angle c (vertically opp angles)

angle b= 52 degrees

angled d is =180 - angle b

= 180 - 52 = 128 degrees

step-by-step explanation:

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