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14 Cards in this Set

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  • Back

adjacent angle?

angles that join up

angles that join up

acute angle triangle

A triangle that has all angles less than 90°

obtuse angled triangle

A triangle that has one angle greater than 90°

scalene triangle

A triangle with no equal angles

isosceles triangle

Two equal angles and sides

equilateral triangle

all sides are equal


opposites are equal

plane shape

2 dimensional


a plane shape with straight sides. all the sides and angles must be the same

Irregular Polygon

A polygon that does not have all sides equal and all angles equal.



Co Interior

Formula To Find Sum Of All Interior Angles Of Polygon

n=number of sides

(n-2) x 180=

divide by 20 to get the size of each angle