rectanglesquaretrianglecircleoval (ellipse)sectorsegmentring (annulus)trapezoidparallelogramrhombuskitepentagonhexagonoctagonpolygonirregular quadrilateralrectangular border base and height3 sides (SSS) / Heron's method2 sides + included angle (SAS)2 sides + non-included angle (SSA)2 angles + included side...
You can also use ourtriangle calculatorto calculate perimeter using interior angles if all of the sides are not known. Circle Perimeter Formula P = 2πr r = radius Try ourcircumference calculatorto solve using the radius, diameter, or area. ...
A triangle is a three-sided polygon. Instructors often ask intermediate and advanced-level math students to calculate the missing angle in a triangle. One method of finding a missing angle is based on the premise that the sum of the interior angles of a triangle equals 180 degrees. Another a...
A trigonometric formula that uses two sides of the triangle and the adjacent angle, along with the sine function on your calculator, can determine the area of that triangle when the height is unknown. This lesson details how to apply...
This is because all of the lengths of its sides are equal as well as all of its vertices are right angles. With this, we can describe the square as a rectangle wherein all of the sides have equal lengths. Answer and Explanation...