9th
grade

Mathematics

65%

accuracy

611

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shruthi Shruthi

4 years

Mathematics

9th

grade

Heron's Formula

shruthi Shruthi

611
plays

15 questions

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1. Multiple Choice
1 minute
1 pt
One side of an equilateral triangle is 4 cm. The area of the triangle is _______
16 √3 cm²
8 √3 cm²
4 √3 cm²
√3 cm²
2. Multiple Choice
1 minute
1 pt
The perimeter of an equilateral triangle is 60 cm. Find the length of its sides.
30 cm
20 cm
15 cm
10 cm
3. Multiple Choice
2 minutes
1 pt
The length of equal sides of an isosceles right triangle is √2 cm. Find the length of its hypotenuse
4 cm
8 cm
2 cm
None of the above
4. Multiple Choice
30 seconds
1 pt
Let a,b,c are the sides of a triangle.Then Semi perimeter S is
$\frac{a\ +\ b\ +\ c}{2}$
$\frac{a\ +\ b\ +\ c\ }{3}$
a + b + c
abc
5. Multiple Choice
30 seconds
1 pt
Which of the following is Heron's Formula for finding area of triangle
$A=\sqrt{s\left(s-a\right)\left(s-b\right)\left(s-c\right)}$
$A=\sqrt{s\left(s+a\right)\left(s+b\right)\left(s+c\right)}$
$A=\sqrt{\left(s+a\right)\left(s+b\right)\left(s+c\right)}$
$A=\sqrt{s\left(s\times a\right)\left(s\times b\right)\left(s\times c\right)}$
6. Multiple Choice
2 minutes
1 pt
Find the area of a triangle whose sides are 9m, 12m and 15m
64 m²
48 m²
84 m²
54 m²
7. Multiple Choice
45 seconds
1 pt
To which of the following triangles, Heron's formula can be used to find the area
Scalene triangle
Equilateral triangle
Isosceles triangle
All the above
8. Multiple Choice
2 minutes
1 pt
The area of a triangle is 120 $m^2$ , the base is 20 m
find the height
6 m
2400 m
60 m
12 m
9. Multiple Choice
2 minutes
1 pt
Find the area of a triangle in which the base is 34 cm and the height is 9 cm
612 cm²
306 cm²
153 cm²
513 cm
10. Multiple Choice
1 minute
1 pt
What is the area of an equilateral triangle with side 2 cm?
$\sqrt{6\ }cm^2$
$\sqrt{8}cm^2$
$\sqrt{3}cm^2$
$4\ cm^2$
11. Multiple Choice
30 seconds
1 pt
What is the purpose of Heron's formula?
To find the angle measure in a triangle.
To find the area of a non-right triangle.
To find the side length of a triangle.
To find the height of a triangle.
12. Multiple Choice
30 seconds
1 pt
How many values must you have to use Heron's formula?
1
2
3
4
13. Multiple Choice
3 minutes
1 pt
The base of an isosceles triangle is 16 cm and it's area is 48 cm². The perimeter of the triangle is
41 cm
36 cm
48 cm
324 cm
14. Multiple Choice
3 minutes
1 pt
The area of equilateral triangle is $36\sqrt{3}cm^2$ . It's perimeter is...
36 cm
$12\sqrt{3}cm$
24 cm
30 cm
15. Multiple Choice
1 minute
1 pt
If the sides of a triangle are 3, 4, and 5, what is the semi-perimeter?
3
6
9
12
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