find value of a and b
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Value of (a) is 80 and (b) 25
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Answer:
a = 5 cm, b = 19°
Step-by-step explanation:
ABCD is a parallelogram.
Therefore, opposite sides are equal.
AB = CD
3a + 7 = 8a - 18
8a - 3a = 7 + 18
5a = 25
a = 5
Also, angle D + angle C = 180°
b + 30° + 25° + 4b + 30° = 180°
5b + 85° = 180°
5b = 95°
b = 19°
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