Easy Scale Drawings

What is a scale drawing?

• A two-dimensional representation of an actual object or place.

• This line segment from the center of a circle to a point on the circle.

• When two lines cross, they form two pairs of vertical angles across from one another.

• An image that has been made bigger and all the angles change size.

True or False: The scale tells us what some length on the scale drawing represents in actual length

• True

• False

Kiera measured a farm and made a scale drawing. In real life, the goat pen is 18 meters long. It is 6 centimeters long in the drawing. What scale did Kiera use for the drawing?

• 1 cm = 6 meters

• 1 m = 18 centimeters

• 18 centimeters = 6 meters

• 1 cm = 3 meters

Jamie made a scale drawing of his apartment building.  The building is 300 ft tall.  He wants his scale to be 1 inch : 10 ft.  How tall should his building be in his scale drawing?

• 25 inches

• 60 inches

• 1/30 inch

• 30 inches

The pair of figures is similar. Find the missing side.

• x = 9

• x = 28

• x = 7

• x = 63

A scale factor less than one creates ....

• a reduction

• an enlargement

• an exact copy

• none of the above

In the figure above, a dilation from A to A' has occurred. What is the scale factor?

scale factor = _______

Mathematical Equivalence

ON

A scale factor less than one creates ....

• a reduction

• an enlargement

• an exact copy

• none of the above

What kind of scale drawing will take place when given the Scale Factor of 3.

• Enlargement

• Reduction

Solve for X.

• 2 ft

• 3 ft

• 4 ft

• 6 ft