This math topic focuses on teaching how to calculate the area of a right triangle by utilizing the area of a surrounding rectangle. The method involves halving the rectangle's area to find the area of the right triangle. Each problem presents different scenarios with visual aids, and students are given multiple choices for answers. This exercise aims to solidify the student's understanding of area calculation in basic geometry, specifically through visual spatial reasoning and practical application.

Work on practice problems directly here, or download the printable pdf worksheet to practice offline.

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Area of a Right Triangle - Concept Intro - From Rectangle Worksheet

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Area of a Right Triangle - Concept Intro - From Rectangle
1
An svg image showing a math problem
Find the area of the TRIANGLE by halving the area of the rectangle around it
a A LaTex expression showing 21\text{cm} to the power of 2
b A LaTex expression showing 22\text{cm} to the power of 2
c A LaTex expression showing 2.4\text{cm} to the power of 2
d A LaTex expression showing 18\text{cm} to the power of 2
e A LaTex expression showing 15\text{cm} to the power of 2
2
An svg image showing a math problem
Find the area of the TRIANGLE by halving the area of the rectangle around it
a A LaTex expression showing 20\text{in} to the power of 2
b A LaTex expression showing 12\text{in} to the power of 2
c A LaTex expression showing 24\text{in} to the power of 2
d A LaTex expression showing 18\text{in} to the power of 2
3
An svg image showing a math problem
Find the area of the TRIANGLE by halving the area of the rectangle around it
a A LaTex expression showing 7\text{km} to the power of 2
b A LaTex expression showing 24\text{km} to the power of 2
c A LaTex expression showing 6\text{km} to the power of 2
d A LaTex expression showing 35\text{km} to the power of 2
4
An svg image showing a math problem
Find the area of the TRIANGLE by halving the area of the rectangle around it
a A LaTex expression showing 20\text{ft} to the power of 2
b A LaTex expression showing 12\text{ft} to the power of 2
c A LaTex expression showing 24\text{ft} to the power of 2
d A LaTex expression showing 80\text{ft} to the power of 2
e A LaTex expression showing 63\text{ft} to the power of 2
5
An svg image showing a math problem
Find the area of the TRIANGLE by halving the area of the rectangle around it
a A LaTex expression showing 16\text{m} to the power of 2
b A LaTex expression showing 0.7\text{m} to the power of 2
c A LaTex expression showing 6\text{m} to the power of 2
6
An svg image showing a math problem
Find the area of the TRIANGLE by halving the area of the rectangle around it
a A LaTex expression showing 12\text{ft} to the power of 2
b A LaTex expression showing 48\text{ft} to the power of 2
c A LaTex expression showing 16\text{ft} to the power of 2
d A LaTex expression showing 0.7\text{ft} to the power of 2
e A LaTex expression showing 6\text{ft} to the power of 2
7
An svg image showing a math problem
Find the area of the TRIANGLE by halving the area of the rectangle around it
a A LaTex expression showing 56\text{in} to the power of 2
b A LaTex expression showing 18\text{in} to the power of 2
c A LaTex expression showing 20\text{in} to the power of 2
d A LaTex expression showing 12\text{in} to the power of 2
8
An svg image showing a math problem
Find the area of the TRIANGLE by halving the area of the rectangle around it
a A LaTex expression showing 12\text{km} to the power of 2
b A LaTex expression showing 56\text{km} to the power of 2
c A LaTex expression showing 1\text{km} to the power of 2
d A LaTex expression showing 9\text{km} to the power of 2
e A LaTex expression showing 18\text{km} to the power of 2