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antiseptic1488 [7]
3 years ago
11

What is the length of A

Mathematics
1 answer:
Marizza181 [45]3 years ago
6 0

Step-by-step explanation:

Since the triangles are right angled and are similar,

by Pythagoras theorem,

(10√3)^2 = (5√3)^2 + a^2

a = 15, a > 0

Topic: Pythagoras theorem

If you like to venture further, do check out my insta (learntionary) where I regularly post useful math tips! Thank you!

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In triangle ABC, angle = 90 degrees. AC = 7, BC = 12. AB = _______ Measure of angle A = _______ Measure of angle B = _______
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Answer:

AB = 13.89

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Measure of angle B = 30.26°

Step-by-step explanation:

The given parameters are;

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Part 1

Hence, the question has the dimensions of the two adjacent sides of the right angle (angle 90°)

From Pythagoras theorem, we have;

A² = B² + C²

Where, A is the opposite side to the right angle, hence;

In the ΔABC,

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Part 2

∠A is the side opposite side BC such that by trigonometric ratios

tan \angle A = \frac{Opposite \, side \,  to \,  angle \,  A}{Adjacent  \,  side  \, to  \, angle \,  A}  = \frac{BC}{AC} = \frac{12}{7} = 1.714

∴ ∠A = Arctan(1.714) or tan⁻¹(1.714) = 59.74°

Part 3

∠B is found from knowing that the sum of the angles in a triangle = 180°

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Answer:

Step-by-step explanation:

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