Math Class 10 Chapter 8 MCQs Solution fbise
Welcome to our detailed guide on Math Class 10 Chapter 8 MCQs Solution fbise. This page provides step-by-step answers for FBISE students preparing for their final board examinations.
Tick the correct option.
(i)
In right ΔABC, a = 2cm, c = 4cm, what is α?
(a) 30°
(b) 45°
(c) 60°
(d) 120°
Correct option is (a)
=======================================
(ii)
If in a triangle, a = 10, b = 15, α = 32° then β = ….
(a) 42.5°
(b) 46.5°
(c) 52.7°
(d) 62.8°
Correct option is (c)
=======================================
(iii)
Area of an equilateral triangle having side a is:
$$(a)\;\frac{\sqrt3}8a\\(b)\;\frac{\sqrt3}4a^2\\(c)\;\frac{\sqrt3}{16}a^2\\(d)\;\frac{\sqrt3}{16}a^2$$
=======================================
(iv)
If a, a and b are length sides of an isosceles triangle, then S = ….
$$(a)\;\frac a2+b\\(b)\;a\;+\;\frac{a+b}2\\(c)\;a\;-\;\frac{a+b}2\\(d)\;a\;+\;\frac b2$$
Correct option is (d)
=======================================
(v)
Area of a triangle ABC with a = 20, b = 30, γ = 90° is:
(a) 0
(b) 30
(c) 300
(d) 600
Correct option is (c)
=======================================
(vi)
For an equilateral triangle,
$$r\;:\;r_1\;:\;R\;=\;….$$
(a) 1 : 2 : 3
(b) 3 : 2 : 1
(c) 1 : 1 : 2
(d) 1 : 3 : 2
Correct option is (d)
=======================================
(vii)
Radius of circum-circle for sides 6, 8, 10 is:
(a) 6
(b) 5
(c) 4
(d) 2
Correct option is (b)
=======================================
(viii)
If a = 5, b = 10, c = 20 are sides of a triangle ABC, then angle α is:
(a) not possible
(b) acute
(c) obtuse
(d) 0°
Correct option is (a)
=======================================
(ix)
Radius of circum-circle R = ….
$$(a)\;\frac a2sec\frac\alpha2\\(b)\;\frac b2sec\frac\beta2\\(c)\;\frac c2csc\gamma\\(d)\;\frac c2\cos\frac\gamma2$$
Correct option is (c)
=======================================
(x)
In a triangle ABC, a = b = c, then
$$Tan(\frac\gamma2)=\;?$$
$$(a)\;\sqrt{\frac{S-a}S}\\(b)\;\sqrt{\frac{S-b}S}\\(c)\;\sqrt{\frac{S-c}S}\\(d)\;all\;(a),\;(b)\;and\;(c)$$
Correct option is (d)
=======================================
(xi)
Shadow of a man 5.6ft tall is making an angle of elevation of 45° with the Sun. What is the length of shadow?
(a) 2.8ft
(b) 5.6ft
(c) 8.4ft
(d) 11.2ft
Correct option is (b)
=======================================
(xii)
R (sin α + sin β + sin γ) = ….
$$(a)\;S\\(b)\;S^2\\(c)\;\frac1S\\(d)\;\frac1{S^2}$$
Correct option is (a)
=======================================
This is the end of Math Class 10 Chapter 4 MCQs Solution fbise
Check! some important links below
