Mathematics: Solve for x A) 10 B) 20 C) 30 D) 60 Help me I’m so pretty and funny I need help, worms infesting my brain.

aStep-by-step explanation:11 less than x, less than meaning minus...

Solve for x A) 10 B) 20 C) 30 D) 60 Help me I’m so

jackandryansis8572

28.01.2022

Option (2). x = 20°

Step-by-step explanation:

In the figure attached,

ΔABC is an equilateral triangle.

By the property of equilateral triangle, all sides of the triangle are equal and measure of all angles of the triangle is 60°.

By this property,

m∠B = 60°

and y = 46 - 16 = 30

By applying Sine rule in ΔBCD,

$\frac{\text{sin}60}{BD}=\frac{\text{sin}80}{46}=\frac{\text{sin}(\angle CBD)}{DC}$

$\frac{\text{sin}80}{46}=\frac{\text{sin}(\angle CBD)}{y}$

sin(∠CBD) = $\frac{30\times \text{sin}80}{46}$

= 0.6423

m∠CBD = 39.96

≈ 40°

m∠ABD = 60° - 40°

= 20°

Therefore, Option (2). 20° will be the answer.

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