Math Section · Study Guide
Geometry & Tape Measure
The Math section tests perimeter, area, circumference, and tape-measure reading to 1/16 inch: all by hand, no calculator. Learn the shapes, then the ruler, then lock everything in with worked examples.
Rectangles
A rectangle has four right angles. Opposite sides are equal. Hover the labels below to highlight each dimension.
Perimeter = 2L + 2W = 2(12) + 2(8) = 40 in
Area = L × W = 12 × 8 = 96 in²
Triangles
For area, you need the base and the perpendicular height, the straight-line distance from the base to the opposite vertex. The dashed line shows the height.
Area = ½ × b × h = ½ × 14 × 10 = 70 in²
Circles
The radius goes from the center to the edge. The diameter is twice the radius. On the test, use π = 3.14 unless told otherwise.
Circumference = 2πr = 2 × 3.14 × 7 = 43.96 in
Area = πr² = 3.14 × 7² = 153.86 in²
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