Sum of Interior angles of regular n-sided polygons is 180(n-2)°. To find the interior angle, divide this amount by the number of sides, n. Straight line = 180° Reflex angle > 180° b c

Pairs of opposite angles are congruent. Diagonals bisect each other. Diagonals separate parallelogram into 2 congruent triangles. Interior angles add up to 360°. ∆ has midpoints at …

ite/Vertical Angles: he intersection of tw m and m , form four T 1 3 angles. Opposite (vertical) angles are congruent (have equal measure Angles 1 and 4 are congruent. Alternate Interior …

Adjacent Angles - two coplanar angles with a common side, a common vertex, and no common interior points. Vertical Angles - two angles whose sides are opposite rays. Complementary …

1) The document provides a quick guide to different types of angles including acute, right, obtuse, straight, and reflex angles. 2) It also summarizes common angle rules for triangles, lines, …

Printable reference sheet for basic angle rules.

Angles are formed when two rays share a common endpoint. They are classified into various types, including acute, obtuse, and right angles. Understanding angles is crucial for working …

Oct 9, 2020 · BASIC GEOMETRIC FORMULAS AND PROPERTIES This handout is intended as a review of basic geometric formulas and properties.

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Mar 7, 2025 · Double Angle Identities. Double angle identities simplify expressions where angles are doubled: Sine double angle: \sin(2\theta) = 2\sin \theta \cos \theta Cosine double angle: …