Calculate the area of the following triangle:
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Calculate the area of the following triangle:
The formula for calculating the area of a triangle is:
(the side * the height from the side down to the base) /2
That is:
We insert the existing data as shown below:
10
Complete the sentence:
To find the area of a right triangle, one must multiply ________________ by each other and divide by 2.
A triangle is exactly half of a rectangle! If you draw a rectangle with the same base and height, then draw a diagonal, you get two identical triangles. So triangle area = rectangle area ÷ 2.
The height is always the perpendicular distance from one vertex to the opposite side (the base). In this diagram, the vertical line AE with length 5 is perpendicular to the horizontal base BC with length 4.
As long as your height is perpendicular to your chosen base, you'll get the correct area! A triangle has three possible base-height pairs, and they all give the same area.
Never! Area represents space covered, which is always positive. If you get a negative result, check your calculation - you likely made an error.
Area is always in square units! If your base and height are in centimeters, your area is in square centimeters (cm²). Here, since no units are given, we just say 10 square units.
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