learnzillion.com/lesson_plans/5416-find-missing-side-lengths-using-the-formula-for-perimeter

In this lesson you will learn how to determine the missing length of a rectangle by applying the perimeter formula for a rectangle.

www.cleavebooks.co.uk/scol/calrtri.htm

Here it is the length. The name hypotenuse is given to the longest edge in a right- angled triangle. (It is the edge opposite to the right angle and is c in this case.)

everydaycalculation.com/right-triangle-calculator.php

This is a free online tool by EverydayCalculation.com to solve math problems involving right triangles. You can calculate angles, sides and area of any right ...

www.softschools.com/math/calculus/using_the_law_of_cosines_to_find_third_side

In particular, the Law of Cosines can be used to find the length of the third side of a ... Solve the equation for the missing side. ... We must first determine which angle is C....

www.mathsisfun.com/algebra/trig-finding-angle-right-triangle.html

We can find an unknown angle in a right-angled triangle, as long as we know the lengths of two of its sides. ... Example: in our ladder example we know the length of: ... Step 3 ...

www.mathepower.com/en/trapezoid.php

What are the names of the sides and angles of a trapezoid? Move the mouse over them and they are shown colored. Ein Trapez. Side a, Side b, Side c, Side d,

rechneronline.de/pi/quadrilateral.php

Enter the first three lengths a, b and c and the two angles between them, β and γ. Choose the number of decimal places and click Calculate. Please enter angles ...

calcurator.org/pythagorean-theorem-calculator

This calculator will find the length of a missing leg or hypotenuse of a right triangle. Please enter the length of the other two legs, and then click 'Calculate'.

play.google.com/store/apps/details?id=com.november31.trig_calc&hl=en_US&gl=US

Solve triangles by entering two sides and one angle, two angles and one side or three sides to find remaining values as used in trigonometry. Angles are ...

www.mathopenref.com/trapezoidarea.html

Use the calculator above to calculate height, base lengths and area of a trapezoid. Enter any three values and the missing one will be calculated. For example: ...