Scaled Copies
Rectangle A is 3 m by 9 m. A rectangle measuring 1.5 m by 4.5 m is this type of copy relative to Rectangle A.
What is a scaled copy?
A scale factor greater than 1 will make the original figure do this in size.
What is enlarge (or grow)?
On Roberto's map, the scale is 4 cm to 5 km. This measurement on the map represents an actual distance of 5 km.
What is 4 centimeters?
A = l*w
When creating a scaled copy of a geometric figure, all corresponding angles must remain this.
What is equal?
A scale factor between 0 and 1, such as 1/2, will make the scaled copy do this in size.
What is shrink (or reduce)?
A = (b*h) / 2
What is the area of a triangle?
If Figure B is a scaled copy of Figure A, the lengths of all corresponding sides must be multiplied by this same non-zero number.
What is the scale factor?
If a polygon is scaled by a factor of 1/2, a side measuring 10 units on the original will measure this length on the copy.
What is 5 units?
If Figure EFGH is a scaled copy of Figure ABCD with a scale factor of 2, segment EF compared to segment AB is this many times as long.
What is twice as long?
If the scale factor from Figure ABCD to Figure EFGH is 1/2, then the scale factor from Figure EFGH back to Figure ABCD is this.
What is 2?
Rectangle A is 3 m by 9 m. A rectangle measuring 4.5 m by 13.5 m has a scale factor of this value relative to Rectangle A.
What is 1.5 (or 3/2)?
In Figure EFGH, which is a scaled copy of ABCD, side GH = 12 corresponds to side CD = 6. The scale factor from ABCD to EFGH is this.
What is 2?