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andriy [413]
3 years ago
8

Use what you know about triangles and angle relationships to determine the value of x and y in this isosceles triangle.

Mathematics
1 answer:
BARSIC [14]3 years ago
4 0

Answer:

x = 13

y = 7

Step-by-step explanation:

✔️Recall that sum of the interior angles of a ∆ = 180°

Therefore:

(3x - 3) + (4x + 20) + (7x - 19) = 180° (sum of ∆)

Solve for x

3x - 3 + 4x + 20 + 7x - 19 = 180

14x - 2 = 180

Add 2 to both sides

14x = 182

Divide both sides by 14

✅x = 13

✔️Recall also that an isosceles has two equal sides, therefore:

8y - 7 = 5x - 16

Plug in the value of x

8y - 7 = 5(13) - 16

8y - 7 = 65 - 16

8y - 7 = 49

Add 7 to both sides

8y = 56

Divide both sides by 8

✍️y = 7

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Answer:

120 ft²

Step-by-step explanation:

The formula to find the area of a triangle is :

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<u>Let us solve it now.</u>

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Juan won and has a score of 8.5, the difference between there score is 3.5.
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Exact Form:

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Decimal Form:

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Step-by-step explanation:

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