Trapezoids

Presentation

•

Mathematics

•

6th Grade

•

Medium

•

CCSS

6.G.A.1

Standards-aligned

Mrs. Pearson

Used 168+ times

FREE Resource

6 Slides • 14 Questions

Trapezoids

What are they?

How can we calculate their areas?

Multiple Select

What properties do ALL trapezoids have?

1 pair of Parallel Sides

Right Angles

4 Sides

Opposite Congruent Sides

Multiple Choice

What name do we use to label the 2 sides that are parallel?

Bases

Heights

Altitudes

Widths

Lengths

Multiple Choice

What name do we use to label the distance between the two bases?

Length

Height

Base

Width

So that's where the 1/2 and the (b₁ + b₂) come from!

Let's see an example of how this works...

Multiple Choice

What are the bases of the green trapezoid?

5 ft & 6 ft

6 ft & 9 ft

5 ft & 9 ft

Multiple Choice

What is the height of the green trapezoid?

5ft

6ft

9ft

Multiple Choice

Fill in the area formula for the green trapezoid.

A=\frac{1}{2}\cdot h\cdot\left(b_1+b_2\right)

$A=\frac{1}{2}\cdot6\cdot\left(5+9\right)$

$A=\frac{1}{2}\cdot5\cdot\left(6+9\right)$

$A=\frac{1}{2}\cdot9\cdot\left(5+6\right)$

Multiple Choice

Shown is the correct formula for the green trapezoid. Which shows the next correct step?
$A=\frac{1}{2}\cdot6\cdot\left(5+9\right)$

$A=\frac{1}{2}\cdot6\cdot14$

$A=\frac{1}{2}\cdot30+9$

$A=\frac{1}{2}\cdot6\cdot45$

Multiple Choice

Shown is the correct next step in calculating the area. So what should the area be?

A=\frac{1}{2}\cdot6\cdot14

Multiple Select

Our answer was missing units! What should the area units be? (There are TWO correct answers!)

ft²

units

sq ft

Multiple Choice

What are the bases of the red trapezoid?

8mm & 5mm

5mm & 4mm

8mm & 4mm

Multiple Choice

What is the height of the red trapezoid?

4mm

5mm

8mm

Multiple Choice

Fill in the area formula for the red trapezoid.

A=\frac{1}{2}\cdot h\cdot\left(b_1+b_2\right)

$A=\frac{1}{2}\cdot5\cdot\left(4+8\right)$

$A=\frac{1}{2}\cdot4\cdot\left(5+8\right)$

$A=\frac{1}{2}\cdot8\cdot\left(4+5\right)$

Multiple Choice

Shown is the correct formula. What's next?

A=\frac{1}{2}\cdot5\cdot\left(4+8\right)

$A=\frac{1}{2}\cdot5\cdot12$

$A=\frac{1}{2}\cdot20\cdot40$

$A=\frac{1}{2}\cdot5\cdot32$

Multiple Choice

Shown is the correct next step. What is the area of the red trapezoid?

A=\frac{1}{2}\cdot5\cdot12

30 sq mm

11 sq mm

70 sq mm

140 sq mm

Trapezoids

What are they?

How can we calculate their areas?

Show answer

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