Download Geometric Properties from Grade 8

Geometric Properties from Grade 8
Complementary Angles two angles whose sum is 90°.
Supplementary Angles
two angles whose sum is 180°.
Opposite Angles
When two lines intersect they form
two pairs of opposite angles that are
equal
Sum of Interior Angles
in a Triangle
Angles in a triangle add up to 180
degrees
Corresponding Angles
(F-Pattern)
Created when a transversal line
crosses two parallel lines. The
corresponding angles in an Farrangement are equal.
Alternate Angles (ZPattern)
Created when a transversal line
crosses two parallel lines. The
alternate angles in an Z-arrangement
are equal.
Co-Interior Angles (CPattern)
Created when a transveral line
crosses two parallel lines. The
interior angles angles in an Carrangement add up to 180 degrees.
Angle f + Angle d = 180 Degrees
Isosceles Triangle
A triangle where two angles are
equal and two sides have the same
length
Equilateral Triangle
A triangle where all sides are the
same length and are angles are equal
to 60 degrees
Acute Triangle
A triangle that has all angles less than
90°