Geometry Exploration

Presentation

•

Mathematics

•

6th - 12th Grade

•

Hard

•

CCSS

6.G.A.1, 7.G.B.4, 3.MD.C.7D

Standards-aligned

Althia McKay

Used 13+ times

FREE Resource

12 Slides • 22 Questions

Geometry Exploration

by Althia McKay

Let's Talk About Types of Triangles

Can you state some types of triangle?

For example: Right Triangle

Your Turn:

Multiple Choice

Which triangle has 3 equal sides?

Right Triangle

Isosceles Triangle

Equilateral Triangle

Fill in the Blanks

An _________ triangle has two equal sides and two equal _______.

Type answer...

Poll

Select possible set of dimensions for an isosceles triangle

5 cm, 7 cm, 10 cm

4 cm, 4 cm, 10 cm

3 cm, 4 cm, 5 cm

Multiple Choice

How do you find the AREA of a TRIANGLE?

Length x Width

Base x Height divided by 2

1/3 (Length x width)

Base x Height

Multiple Choice

108 cm

540 cm

108 cm²

54 cm²

Multiple Choice

17 units²

20 units²

10 units²

16 units²

Multiple Choice

What is the formula for the area of a rectangle?

Length x Width

Length x Length

Width x Width

Multiple Choice

When calculating the area of a square, you only need to know the measurement of 1 side because they are all the same.

True

False

Multiple Choice

Find the area of this square

49 inches

49 units

14 units²

49 units²

Perimeter of a Circle

Perimeter of a circle is also called the circumference of the circle.

To find the perimeter for regular 2D shapes like triangles, squares and rectangle, we just add all the dimensions.

Perimeter of Circle condt.

To calculate the perimeter of a circle...

Multiple Choice

Is the red line a radius or diameter of the circle?

Radius

Diameter

Multiple Choice

If my diameter is 19 inches, what is my radius?

38 inches

9.5 inches

59.66 inches

119.32 inches

Multiple Choice

What is the circumference of this circle ?

3.14 cm

37.68 cm

24 cm

68.4 cm

Multiple Choice

Find the circumference (to the nearest whole number)

88 in

44 in

116 square in

None of the above

Area of a Circle

To find the area of a circle we need pi and the radius of the circle. We put a little more on it though... What is the formula for the area of a circle?

Multiple Choice

What is the formula for area of a circle?

A = pi x D

A = 2pi x r

A = pi x r²

A = pi x D2

Perimeter of Compound Shapes

What is a Compound Shape?

To find the perimeter of a compound shape we need the measurement of all the______.

Can you find the perimeter of this Compound Shape?

Can you Calculate the Perimeter of this Compound Shape?

How do we find unknown sides?

Multiple Choice

Find the perimeter of the given shape

19 ft

22 ft

16 ft

21 ft

Multiple Choice

What is the perimeter of the compound shape?

20 cm

4 cm

30 cm

19 cm

Area of Compound Shape

Multiple Choice

Find the missing yellow length

2 cm

6 cm

9 cm

4 cm

Fill in the Blanks

The compound shape has been split into 2 rectangles. The area of rectangle A is 4 cm x ? cm

(just the number. no units)

Type answer...

Multiple Choice

The area of rectangle B is ?

5 cm x 12 cm

5 cm x 11 cm

12 cm x 5 cm

8 cm x 5 cm

Multiple Choice

Find the area of the following shape

7920cm²

178cm²

186cm²

213cm²

Multiple Choice

What is the area of the composite figure?

80 cm²

16 cm²

96 cm²

32 cm²

Multiple Choice

Find the area of the polygon.

14 in²

68 in²

36 in²

24 in²

Area of a Compound Shape

Geometry Exploration

by Althia McKay

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