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zhannawk [14.2K]
3 years ago
7

1) what is the value of x ?

Mathematics
1 answer:
Vikentia [17]3 years ago
6 0

Answer:

a). x = 9

b). m∠ABC = 27°

c). m∠CBD = 153°

Step-by-step explanation:

1). Property of linear pair of angles states, "sum of linear pair of angles is 180°"

3x + (15x + 18) = 180°

18x + 18 = 180

18x = 180 - 18

18x = 162

x = 9

2). m∠ABC = 3x°

                   = 3×9

                   = 27°

3). m∠CBD = (15x + 18)°

                  = (15×9 + 18)°

                  = (135 + 18)°

                  = 153°

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