Mr. Núñez

Quadrilaterals

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Types of quadrilaterals The types of quadrilaterals can be classified by relationships of their sides and angles.   A general Quadrilateral has 4 sides and 4 angles. The following is a general quadrilateral. Parallelogram: A four-sided polygon with two pairs of parallel and equal sides. The following is a parallelogram. Rectangle: A rectangle is a parallelogram with … Read more

Classifying Triangles

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Triangles can be classified by their angles and/or side lengths. Use the chart below to help you name triangles. Classify by the lengths of their sides Classify by the measures of their angles Equilateral has 3 congruent sides A Right triangle has 1 right angle Isosceles has 2 congruent sides An Acute triangle has 3 … Read more

Polygons

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Polygon Triangle Quadrilateral Pentagon Hexagon Heptagon Octagon Nonagon Decagon Sides 3 4 5 6 7 8 9 10 Angles 3 4 5 6 7 8 9 10 Vertices 3 4 5 6 7 8 9 10 Note: polygons with more than 10 sides are usually called an “n-gon”. For example a 15-gon has 15 sides. Polygon: … Read more

Congruent vs Similar

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If the shapes being compared are exactly equal in size and shape, then they are congruent. Congruent sides or segments have the exact same length. Congruent angles have the exact same measure. Note: Congruent segments, sides, and angles are often marked. Example:  If the shapes being compared are exactly the same shape but not same size, then they are similar. Example:

Angles

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Angle type Degrees Example Acute 1° – 89° Right 90° Obtuse 91° – 179° Straight 180° Full Rotation “Circle” 360° Every triangle is made up of 180°, and every quadrilateral is made up of 360°.