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 …

This document provides a cheat sheet of common geometry concepts and formulas. It includes definitions and properties for lines, angles, triangles, circles, transformations, area, volume, …

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.

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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formulas: - External Angle Theorem - c=a+b (external ∠ of ) - Total Angle Sum - s=(n-2)x180° - (s=angle sum, n=no. of sides) - Interior Angle Size - Int. angle size=s/n - Euler’s Formula - …

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: …