Find Angle 'A' If :

Find angle 'A' if :

Sum

From the figure we have

cos A = `(10)/(20)`

cos A = `(1)/(2)`

cos A = cos 60°

A = 60°

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Solution of Right Triangles

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Chapter 24: Solution of Right Triangles [Simple 2-D Problems Involving One Right-angled Triangle] - Exercise 24 [Page 303]

Chapter 24 Solution of Right Triangles [Simple 2-D Problems Involving One Right-angled Triangle]
Exercise 24 | Q 2.1 | Page 303

Find 'x', if :

Find AD, if :

Find the length of AD.
Given: ∠ABC = 60^o.
∠DBC = 45^oand BC = 40 cm.

Find AB.

In trapezium ABCD, as shown, AB // DC, AD = DC = BC = 20 cm and ∠ A = 60°. Find: length of AB

In the given figure, AB and EC are parallel to each other. Sides AD and BC are 2 cm each and are perpendicular to AB.

Given that ∠AED = 60° and ∠ACD = 45°. Calculate: AC

In right-angled triangle ABC; ∠B = 90°. Find the magnitude of angle A, if:
BC is `sqrt(3)` times of AB.

Find PQ, if AB = 150 m, ∠ P = 30° and ∠ Q = 45°.

Find PQ, if AB = 150 m, ∠P = 30° and ∠Q = 45°.

If tan x° = `(5)/(12)`,

tan y° = `(3)/(4)` and AB = 48 m; find the length of CD.