a2+ b2=c2
152+202= 625 (15x15+20x20)
sqrt 625=25
Side c is 25
20
The lengths of the legs of a right triangle are 15 cm and 20 cm. What is the length of the hypotenuse?
20 since the question mentions the hypotenuse, by definition this must be a right angled triangle, therefore use Pythagoras's theorem... Let a be the unknown side.... Let b be the side of length 15 and... Let c be the hypotenuse of length 25 From the theorem: a^2 + b^2 = c^2 by substitution... a^2 + 15^2 = 25^2 or... a^2 = 25^2 - 15^2 or... a^2 = 625 - 225 that is... a^2 = 400 or... a = SQRT 400 which is... 20
The length of the third side is 20 cm
Surprisingly, yes.
wire is first bent into the shape of a triangle. Each side of the triangle is 16 cm long. Then the wire is unbent and reshaped into a rectangle. If the length of the rectangle is 17 cm, what is its width?
20
The lengths of the legs of a right triangle are 15 cm and 20 cm. What is the length of the hypotenuse?
20 units
The length of the other leg would be 13.2. Keep in mind the Pythagorean theorem: a2 + b2 = c2 a would be the length of one side of the triangle, b is the other side, and c is the hypotenuse. a2 + (15)2 = (20)2 a2 + 225 = 400 a2 = 400 - 225 a2 = 175 √a2 = √175 a = 13.2
20 since the question mentions the hypotenuse, by definition this must be a right angled triangle, therefore use Pythagoras's theorem... Let a be the unknown side.... Let b be the side of length 15 and... Let c be the hypotenuse of length 25 From the theorem: a^2 + b^2 = c^2 by substitution... a^2 + 15^2 = 25^2 or... a^2 = 25^2 - 15^2 or... a^2 = 625 - 225 that is... a^2 = 400 or... a = SQRT 400 which is... 20
13
The length of the third side is 20 cm
Surprisingly, yes.
The sum of the two shorter sides of a triangle must be longer than the third. Thus the third side can be any length greater than 0 and less than 20. Examples are 0.5, 2, 5, 10, 15, 17.5, 19.9.
Subtract the two side lengths from the perimeter. The perimeter of a triangle is just the length of the 3 sides added together. Eg. Q: A triangle has a perimeter of 20 m. One side is 5m and another is 10m. How long is the 3rd side? A: Perimeter - side 1 - side 2 = side 3 Side 3 = 20 - 5 - 10 = 5 m
Using Pythagoras' theorem the length of the remaining side is 40 meters