MEDIUM
9th CBSE
IMPORTANT
Earn 100

The semi perimeter of an equilateral triangle is 60 cm. The area is

50% studentsanswered this correctly

Important Questions on Heron's Formula

EASY
9th CBSE
IMPORTANT
MATHEMATICS>Chapter 12 - Heron's Formula>MULTIPLE CHOICE QUESTIONS>Q 22
Half of perimeter of a triangle is 20 cm.The product of (s-a),(s-b) and (s-c) is 30 cm3, where s=a+b+c. then area of triangle is equal to
MEDIUM
9th CBSE
IMPORTANT
MATHEMATICS>Chapter 12 - Heron's Formula>MULTIPLE CHOICE QUESTIONS>Q 23
In an equilateral triangle of side 'a', the length of altitude will be
EASY
9th CBSE
IMPORTANT
MATHEMATICS>Chapter 12 - Heron's Formula>MULTIPLE CHOICE QUESTIONS>Q 24
The area of an equilateral triangle of side 2a cm is
EASY
9th CBSE
IMPORTANT
MATHEMATICS>Chapter 12 - Heron's Formula>MULTIPLE CHOICE QUESTIONS>Q 25
In Heron's formula '2S' stand for
EASY
9th CBSE
IMPORTANT
MATHEMATICS>Chapter 12 - Heron's Formula>MULTIPLE CHOICE QUESTIONS>Q 26
The difference between the semi-perimeter and the sides of a △ ABC are 5 cm,7 cm and 8 cm respectively. The area of the triangle is
EASY
9th CBSE
IMPORTANT
MATHEMATICS>Chapter 12 - Heron's Formula>MULTIPLE CHOICE QUESTIONS>Q 27
The perimeter of an equilateral triangle is equal to the perimeter of a square. The diagonal to the square is 92 cm. The area of equilateral triangle is
EASY
9th CBSE
IMPORTANT
MATHEMATICS>Chapter 12 - Heron's Formula>TEST YOURSELF>Q 1
If the area of a triangle is k30 cm2, two sides of which are 8 cm and 11 cm and its perimeter is 32 cm. Find the value of k.
MEDIUM
9th CBSE
IMPORTANT
MATHEMATICS>Chapter 12 - Heron's Formula>TEST YOURSELF>Q 2
Find the area of a quadrilateral ABCD in which AB=9 m,BC=40 m,CD=15 m,∠B=90° and DA=28 m.