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ikadub [295]
3 years ago
7

Help!!

Mathematics
1 answer:
saul85 [17]3 years ago
5 0

Answer:

40.47°, 49.53°

Step-by-step explanation:

Complementary angles add up to 90

7r + 5 + 8r + 9 = 90

15r + 14 = 90

15r = 76

r = 76/15

7r + 5 = 7(76/15) + 5 = 40 7/15

8r + 9 = 8(76/15) + 9 = 49 8/15

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Im dumb so help me out here 50 points each Click on the image to enlarge
antiseptic1488 [7]

Answer:

D

Step-by-step explanation:

The sum of the 3 angles in a triangle = 180°, that is

∠ 1 + ∠ 2 + ∠ 3 = 180°

Given ∠ 1 + ∠ 2 = 134°, then

134° + ∠ 3 = 180° ( subtract 134° from 180° )

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8 0
3 years ago
For questions 8 – 10, answer the questions about tangent-tangent angles.
olchik [2.2K]

Answer:

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Step-by-step explanation:

8). Formula for the angle formed outside the circle by the intersection of two tangents or two secants is,

Angle formed by two tangents = \frac{1}{2}(\text{Difference of intercepted arcs})

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9). Following the same rule as above,

Angle formed between two tangents = \frac{1}{2}(\text{Difference of intercepted arcs})

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250 = m(arc ZWY) - 55

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Therefore, measure of arc ZWY = 305° will be the answer.

10). m(arc BAC) = \frac{1}{2}([m(\text{arc BDC})-m(\text{arc BC})])

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                          = \frac{148}{2}

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