Surface Area

Day 8 Area and Surface Area

Math 6

Objective

Today I will explain how to use the base and height of a parallelogram so that I can  find the area of a triangle. I know I am successful when I complete Cool Down 8 to earn a 4. 

Composing Parallelograms

Here is Triangle M.

Han made a copy of Triangle M and composed three different parallelograms using the original M and the copy, as shown here.

Fill in the Blanks

In the first parallelogram, the base is ____ units and the height the is ____ units?

Fill in the Blanks

In the second parallelogram, the base is ____ units and the height the is ____ units?

Fill in the Blanks

In the third parallelogram, the base is ____ units and the height the is ____ units?

Open Ended

Find the area of the parallelogram.

Open Ended

Find the area of the parallelogram.

Open Ended

Find the area of the parallelogram.

More Triangles

Let's find the area!

Multiple Select

What is the formula to find the area of a triangle? (choose all that apply)

• A = bh

• $$A\ =\ bh\div2$$  

• $$A\ =\frac{1}{2}bh$$  

• $$\ A\ =\ h\left(b\ +\ b\right)\div2$$  

Multiple Choice

My height has to be ______ to my base.

• parallel

• criss crossed

• perpendicular

• curved

Open Ended

What is the area of this triangle?

Multiple Choice

Find the area of the triangle.

• 12 square units

• 8 square units

• 6 square units

• 4 square units

Multiple Choice

What is the area of this triangle?

• 14 units²

• 24 units²

• 48 units²

Multiple Choice

Area of triangle?

• 17 units²
• 20 units²
• 10 units²
• 16 units²

Poll

After this lesson I feel...

• 👍

• 👎