68 Videos for "diagonals"

Parallelogram Properties  Concept
Math › Geometry › Polygons
How to identify all of the special properties of parallelograms and use them to solve problems. 
Polygon Angle Sum  Problem 2
Math › Geometry › Polygons
How to find the number of sides of a polygon when you know the sum of its angles. 
Polygon Angle Sum  Problem 3
Math › Geometry › Polygons
How to apply the polygon angle sum theorem when you need to solve for x. 
Parallelogram Properties  Problem 1
Math › Geometry › Polygons
How to solve for variables that describe the angles in a parallelogram. 
Parallelogram Properties  Problem 2
Math › Geometry › Polygons
How to find the perimeter of a parallelogram when the sides are given in terms of a variable. 
Two Column Proofs  Problem 2
Math › Geometry › Triangles
How to use a two column proof to show that two angles are congruent in a parallelogram with one diagonal. 
Using the Pythagorean Theorem to find a Missing Leg  Problem 3
Math › Trigonometry › Pythagorean Theorem
How to use the Pythagorean Theorem to find the surface area of a prism given one of the face diagonals and the lengths of two edges. 
Using the Pythagorean Theorem to find a Missing Leg  Problem 3
Math › Geometry › Pythagorean Theorem
How to use the Pythagorean Theorem to find the surface area of a prism given one of the face diagonals and the lengths of two edges.