Calculating Area of Shapes
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Objective
I can calculate the area of various two-dimensional shapes, including triangles, quadrilaterals, and circles.
Part 1 of 4
Warm-up video
Kayla Jones · 4:19
We don't generate video — this one is by Kayla Jones on YouTube. The practice questions and exit ticket below were drafted by AI for this objective, and every question is editable in the teacher guide.
Part 2 of 4
Key concepts
3 concepts
- 1
The area of a triangle can be found using the formula ½ * base * height, where the height is the perpendicular distance from the base to the opposite vertex.
- 2
The area of a parallelogram is calculated by multiplying the base by the height, ensuring the height is measured straight up and down, not along the slant.
- 3
The area of a trapezoid is found using the formula ½ * (base1 + base2) * height, where base1 and base2 are the lengths of the parallel sides and the height is the perpendicular distance between them.
Part 3 of 4
Practice
10 questions
What is the formula for the area of a triangle?
A triangle has a base of 10 cm and a height of 8 cm. What is its area?
Part 4 of 4
Exit ticket
Quick comprehension check
“Find the area of a trapezoid with base 1 = 4 inches, base 2 = 10 inches, and height = 3 inches. Show your work.”
Sample answer included in the free materials
Get the materials
Teacher guide, student handout, and slides — free, in Google Docs format
Teacher Guide
Complete lesson plan with answer keys and alternate activities
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