Calculating Areas of Triangles

Calculating Areas of Triangles

Assessment

Interactive Video

Mathematics

9th - 10th Grade

Hard

Created by

Thomas White

FREE Resource

This video tutorial explains how to calculate the area of irregular land using the scalene triangle formula. It begins with an introduction to the problem and the necessity of drawing a diagonal line on the land plot. The video then details the use of the scalene triangle formula, demonstrating calculations for two triangles formed by the diagonal. Finally, it sums the areas of these triangles to find the total area of the irregular land, concluding with a recap of the steps involved.

Read more

11 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the main challenge in calculating the area of irregular land?

It is a perfect circle

All sides are equal

Different lengths and widths

It is a perfect square

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why is a diagonal line drawn on the land?

To make it look symmetrical

To measure the perimeter

To divide it into two triangles

To mark the boundary

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the formula used to calculate the area of a scalene triangle?

a = b * h / 2

a = l * w

a = s * (s-a) * (s-b) * (s-c)

a = π * r^2

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does 's' represent in the scalene triangle formula?

The side length

The diagonal

The semi-perimeter

The height

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In the first triangle, what is the semi-perimeter if the sides are 5m, 3m, and 4m?

6 meters

12 meters

5 meters

7 meters

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the area of the first triangle with sides 5m, 3m, and 4m?

8 square meters

6 square meters

10 square meters

12 square meters

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In the second triangle, what is the semi-perimeter if the sides are 13m, 12m, and 5m?

18 meters

20 meters

25 meters

15 meters

Create a free account and access millions of resources

Create resources
Host any resource
Get auto-graded reports
or continue with
Microsoft
Apple
Others
By signing up, you agree to our Terms of Service & Privacy Policy
Already have an account?