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Help and please show your work

Help and please show your work-example-1

2 Answers

5 votes

Answer:

<CBD = 135°

Explanation:

<ABD is a straight angle so <ABD = 180

<ABD = <ABC + <CBD = 180

but

<ABC = 1/3 <CBD --> 3 <ABC = <CBD

The ratio of <ABC to <CBD = 1 : 3

1 + 3 = 4

180 / 4 = 45°

So

<ABC = 45° and <CBD = 3 * 45 = 135°

Answer

<CBD = 135°

User Olli
by
8.7k points
0 votes

Answer:

<CBD = 135°

Explanation:

<ABD is a straight angle so <ABD = 180

<ABD = <ABC + <CBD = 180

but

<ABC = 1/3 <CBD --> 3 <ABC = <CBD

The ratio of <ABC to <CBD = 1 : 3

1 + 3 = 4

180 / 4 = 45°

So

<ABC = 45° and <CBD = 3 * 45 = 135°

Answer

<CBD = 135°

User Qi Tang
by
8.6k points

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