Principles of Mathematics Geometry Review

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Principles of Mathematics Geometry Review

GEOMETRY REVIEW

Today we will review geometry that you should have learned in your previous math experiences. We will focus on angles, shapes and congruent triangles today.

Acute Angle Obtuse Angle

Properties:

Supplementary Angles add to

Angles on a line add to

Angles at a point add to

Vertically opposite angles are equal

Straight line equals

Shapes:

Triangles (sum of all the angles is ):

Scalene triangle:

No equal sides

No equal angles

Quadrilaterals (sum of all angles is ):

Square:

A square with four equal sides or a rhombus with right angles

Circles:

Congruent triangles:

Congruency – size and shape are identical. For triangles corresponding angles and sides are equal.

Conditions for congruency for triangles:

SSS – Side, Side, Side – Three corresponding sides are equal.

SAS – Side, Angle, Side – Two corresponding sides are equal and a corresponding angle between the sides are equal.

ASA – Angle, Side, Angle – Two corresponding angles are equal and one corresponding side is equal.

SSS

ASA

SAS

Applying Geometric Properties:

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