Right triangle has two perpendicular sides forming a 90-degree angle. Opposite side is called hypotenuse, adjacent sides are called legs. Every right triangle is half of a rectangle divided along its diagonal
Pythagoras theorem states that in a right triangle, the square of the hypotenuse equals the sum of the squares of the other two sides. The sides of a right triangle are called Perpendicular, Base, and Hypotenuse. The formula for the hypotenuse is c² = a² + b²
Right triangle has one 90-degree angle and two equal legs. Calculator provides various calculations for edge lengths, altitude, angles, area, perimeter
Rectangle is a quadrilateral with two equal sides and four right angles. Area of rectangle equals length multiplied by width (A = L * W). All squares are rectangles, but not all rectangles are squares
Measure 3 units from corner on one side. Measure 4 units from corner on other side. Line up tape measure between marks. Check if diagonal measures 5 units
Triangle area formula: A = 1/2bh. Height can be found by dividing base by 2, then dividing by area. Any side can be base, regardless of triangle drawing