When a triangle is not a right triangle
I quote " The square on the hypotenuse of a rightangled triangle..."
A right triangle is easy, simply multiply the two sides and divide by two. A non-right triangle is a bit more of a challenge. You have to make it a right triangle by adding a right triangle to it. Calculate and then subtract the area of what you had to add.
No. Given a triangle with only the right angle and the hypotenuse, you cannot calculate the other sides nor the other angles.
Add up the sides.
When a triangle is not a right triangle
I quote " The square on the hypotenuse of a rightangled triangle..."
Pythagoras theorem will always work with a right-angled triangle.
A right triangle is easy, simply multiply the two sides and divide by two. A non-right triangle is a bit more of a challenge. You have to make it a right triangle by adding a right triangle to it. Calculate and then subtract the area of what you had to add.
It depends on what else you know about the triangle.
it depens if the isosceles triangle is a right triangle or not
A right triangle is easy, simply multiply the two sides and divide by two
3
No. Given a triangle with only the right angle and the hypotenuse, you cannot calculate the other sides nor the other angles.
You don't. In a right triangle, you can find out one of the sides if you are given the OTHER TWO sides; if you only know one side, you don't have enough information.
Add up the sides.
The cosine of an angle is the ratio of the adjacent side to the hypotenuse only when the angle is in a right triangle. (Otherwise, how would you know which side is the "hypotenuse" ?)