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16 terms

Geometry

STUDY
PLAY
area of rectangle
length x width
perimeter of rectangle
(length + width) x 2
area of parallelogram
base x height
area of triangle
(base x height) ÷ 2
perimeter of triangle
side 1 + side 2 + side 3
area of circle
3.14 x radius x radius
circumference of circle
3.14 x diameter (3.14 x 2 x radius)
area of a square
side x side
perimeter of a square
4 x side
Scalene
A triangle with NO congruent sides
Isosceles
A triangle with TWO OR MORE congruent sides
Equilateral
A triangle with THREE congruent sides
Acute
A triangle with THREE acute angles
Obtuse
A triangle with ONE obtuse angle
Right
A triangle with ONE right angle
Equiangular
A triangle with THREE congruent angles (they are all 60°)