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3 years ago

How do I find it. ..............

Mathematics

1 answer:

Alenkinab [10]3 years ago

7 0

Answer:

∠CBD = 4(4) + 52°

= 16° + 52°

Step-by-step explanation:

Given that,

∠ABC = 8x - 10°

∠CBD = 4x + 52°

Also,

∠ABD = 90°

∠ABD = ∠ABC + ∠CBD

∠ABD (90°) = (4x + 52°) + (8x - 10°)

∠ABD (90°) = 4x + 52° + 8x - 10°

∠ABD (90°) = (4x + 8x) + (52° - 10°)

∠ABD (90°) = 12x + 42°

90° - 42° = 12x

48° = 12x

$\frac{48}{12}$ = x

4° = x

∠CBD = 4x + 52°

∴ ∠CBD = 4(4°) + 52°

= 16° + 52°

= 68°

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