Lesson 5: Area of Triangles and Trapezoids Part 2
Lesson 5: Area of Triangles and Trapezoids Part 2
30 Minutes
Mrs. Ashlee Deduijtsche
For Full Name Please Put Your Student ID Only:
Instructions:
Please watch the Nearpod video about finding the area of triangles and trapezoids.
The video does not walk through the handouts.
IMPORTANT NOTES FOR THIS LESSON:
Use the formula to find the area of a triangle A = bh /2 or A = 1/2bh (where b is the base and h is the height). If you were to cut a rectangle or parallelogram in half you would see a triangle, which is why the formula has you either dividing bh by 2 or multiplying it by 1/2.
Remember that the height of a triangle will form a right or 90 degree angle with the base. This can be shown either inside or outside the triangle.
Use the formula A = 1/2(b1 + b2)h (area equals one half times base 1 plus base 2 times the height. You will need to follow order of operations. The formula can also be written A = (b1 + b2)h/2 (area equals base 1 plus base 2 times the height all divided by 2.
The formula can be manipulated to solve for a missing measurement. Although in this lesson we will not see much of finding the missing measurement.