CBSE Class 9 Heron’s Formula MCQ By Clarify Knowledge
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CBSE Class 9 Heron’s Formula MCQ Table
Question 1.
An isosceles right triangle has area 8 cm². The length of its hypotenuse is
(a) 32−−√ cm
(b) 16−−√ cm
(c)48−−√ cm
(d) 24−−√ cmAnswer
Question 2.
The perimeter of an equilateral triangle is 60 m. The area is
(a) 10√3 m²
(b) 15√3 m²
(c) 20√3 m²
(d) 100√3 m²Answer
Question 3.
The sides of a triangle are 56 cm, 60 cm and 52 cm long. Then the area of the triangle is
(a) 1322 cm²
(b) 1311 cm²
(c) 1344 cm²
(d) 1392 cm²Answer
Question 4.
The area of an equilateral triangle with side 2√3 cm is
(a) 5.196 cm²
(b) 0.866 cm²
(c) 3.496 cm²
(d) 1.732 cm²Answer
Question 5.
The length of each side of an equilateral triangle having an area of 9√3 cm² is
(a) 8 cm
(b) 36 cm
(c) 4 cm
(d) 6 cmAnswer
Question 6.
If the area of an equilateral triangle is 16√3 cm², then the perimeter of the triangle is
(a) 48 cm
(b) 24 cm
(c) 12 cm
(d) 36 cmAnswer
Question 7.
The sides of a triangle are 35 cm, 54 cm and 61 cm. The length of its longest altitude is
(a) 16√5 cm
(b) 10√5 cm
(c) 24√5 cm
(d) 28 cmAnswer
Question 8.
The area of an isosceles triangle having base 2 cm and the length of one of the equal sides 4 cm is
(a) 15−−√ cm²
(b) 152−−√ cm²
(c) 215−−√5 cm²
(d) 415−−√ cm²Answer
Question 9.
The edges of a triangular board are 6 cm, 8 cm and 10 cm. The cost of painting it at the rate of 9 paise per cm² is
(a) Rs 2.00
(b) Rs 2.16
(c) Rs 2.48
(d) Rs 3.00Answer
Question 10.
The base of a right triangle is 48 cm and its hypotenuse is 50 cm. The area of the triangle is
(a) 168 cm²
(b) 252 cm²
(c) 336 cm²
(d) 504 cm²