This document defines and describes various geometric shapes: an isosceles triangle, an acute triangle, an obtuse triangle, a right triangle, a parallelogram, a scalene triangle, a circle defined by its radius and center, a square, a trapezoid, and an equilateral triangle. It notes that understanding the properties of these shapes allows using formulas to find their measures and solve real-world problems.

2. A triangle that has two sides of equal length and congruent base angles

3. A triangle that has all angles less than 90 degrees

4. A triangle that has one obtuse angle - An obtuse angle has a measure greater than 90 degrees

5. A triangle that has a right angle - A right angle is equal to 90 degrees

6. A quadrilateral whose opposite sides are parallel and of equal length

7. A triangle with no congruent sides and no congruent angles

8. A circle is the set of all points in a plane that are a distance r from a given point, called the center . -The distance r is the radius of the circle

9. A quadrilateral with four congruent sides and four right angles

10. A quadrilateral with only two parallel sides

11. A triangle with three congruent sides and three congruent angles

12. It is important to know these shapes and their characteristics to find information such as: Area Perimeter Volume These formulas will help us to find answers to real life problems in the future