Pre-Geometry

9th grade honors geometry class

Names for all different triangles?

Triangles can be classified based on their sides and angles, leading to terms such as equilateral, isosceles, scalene, acute, right, and obtuse triangles.

Properties for equilateral triangle

An equilateral triangle has all three sides of equal length and all three angles measuring 60 degrees each.

Properties for isosceles triangle

At LEAST two sides of equal length

Properties for scalene triangle

A scalene triangle has all sides of different lengths and all angles of different measures.

Properties for acute triangle

An acute triangle has all three interior angles measuring less than 90 degrees.

Properties for right triangle

A right triangle has one interior angle that measures exactly 90 degrees, with the other two angles being acute.

Properties for obtuse triangles

An obtuse triangle has one interior angle that measures more than 90 degrees, while the other two angles are acute.

What are the different types of quadrilaterals

rectangles, squares, parallelograms, rhombuses, trapezoids, and kites, each with distinct properties.

Properties for parallelograms

opposite sides that are parallel and equal in length, and opposite angles that are equal.

Properties for rhombuses

All sides are equal in length, opposite angles are equal, and the diagonals bisect each other at right angles.

Properties for trapezoids

one pair of opposite sides that are parallel, and the angles adjacent to each leg are supplementary.

Properties for kites

Two pairs of adjacent sides are equal in length, one pair of opposite angles are equal, and the diagonals intersect at right angles.

Adjecent meaning

Next to or adjoining something else; sharing a common side or boundary.

Bisect meaning

To divide into two equal parts, typically referring to angles or line segments.

Congruent meaning (angles)

angles are angles that have the same measure.

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Having the same size and shape; figures that can be matched exactly when side by side.