7th Grade Scale Drawings Quiz: 10 Questions with Explanations

A 24 feetB 10 feetC 1.5 feetD \(\frac{2}{3}\) foot

Multiply by 6: \(4 \times 6 = 24\). Dividing gives the wrong direction.

A 150 inchesB 6 inchesC 35 inchesD 25 inches

Divide by 5: \(30 \div 5 = 6\).

A 1 in = 12 ftB 1 in = 1 ftC 1 ft = 12 ftD 12 in = 1 ft

1 ft = 12 in, so 1 in : 12 in is 1 : 12.

A 25 miles per inchB 100 miles per inchC 52 miles per inchD 48 miles per inch

\(50 \div 2 = 25\).

A 12 sq ftB 48 sq ftC 24 sq ftD 36 sq ft

Each square inch is \(4 \times 4 = 16\) sq ft, so \(3 \times 16 = 48\).

A \(\frac{1}{2}\) footB 2 feetC 8 feetD 4 feet

1 in = 4 ft, so 2 in = 8 ft.

A 4 feetB 12.5 feetC 25 feetD 250 feet

\(2.5 \times 10 = 25\).

A 3B 6C 27D 9

Area changes by the square of the length factor: \(3^2 = 9\).

A 2.5 inchesB 5 inchesC 40 inchesD 10 inches

Actual is \(5 \times 8 = 40\) ft. At 4 ft per inch, \(40 \div 4 = 10\) in.

A She did not convert feet to inchesB She should have added 12C Scale factors are always 1D She should have multiplied by 5 twice

5 ft is 60 in, so the scale factor is \(\frac{1}{60}\).