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# How do you find the missing length of a similar right triangle?

## How do you find the missing length of a similar right triangle?

If the lengths of the hypotenuse and a leg of a right triangle are proportional to the corresponding parts of another right triangle, then the triangles are similar. (You can prove this by using the Pythagorean Theorem to show that the third pair of sides is also proportional.) In the figure, DFST=DESR .

How do you find the missing side of the right?

Given two sides

1. if leg a is the missing side, then transform the equation to the form when a is on one side, and take a square root: a = √(c² – b²)
2. if leg b is unknown, then. b = √(c² – a²)
3. for hypotenuse c missing, the formula is. c = √(a² + b²)

### Which of the triangles are right triangles?

A right triangle consists of two legs and a hypotenuse. The two legs meet at a 90° angle and the hypotenuse is the longest side of the right triangle and is the side opposite the right angle. There are a couple of special types of right triangles, like the 45°-45° right triangles and the 30°-60° right triangle.

Is Pythagorean theorem only for right triangles?

Pythagoras’ theorem only works for right-angled triangles, so you can use it to test whether a triangle has a right angle or not.

#### Is Sohcahtoa only for right triangles?

Q: Is sohcahtoa only for right triangles? A: Yes, it only applies to right triangles. If we have an oblique triangle, then we can’t assume these trig ratios will work. A: They hypotenuse of a right triangle is always opposite the 90 degree angle, and is the longest side.

How do you find the side lengths of similar triangles?

Equate the ratio of the sides with the corresponding scale factors to determine the side lengths of the triangles. Compare the similar triangles and complete the similarity statements, using the SSS criterion. Identify the proportional pairs of sides and rearrange the vertices based on the triangle given in the statement.

## Which is sufficient to say that two right triangles are similar?

Because the two are similar triangles, is the hypotenuse of the second triangle, and is its longer leg. Therefore, . Which of the following is sufficient to say that two right triangles are similar? Two sides and one angle are congruent. All the angles are congruent. Two angles and one side are congruent. Two of the sides are the same.

What is the geometric mean of a right triangle?

In fact, the geometric mean, or mean proportionals, appears in two critical theorems on right triangles. In a right triangle, if the altitude drawn from the right angle to the hypotenuse divides the hypotenuse into two segments, then the length of the altitude is the geometric mean of the lengths of the two segments.

### How do you prove that two triangles are similar?

By the Side-Angle-Side Similarity Theorem (SASS), if two sides of a triangle are in proportion with the corresponding sides of another triangle, and the included angles are congruent, then the triangles are similar. and , so by the Division Property of Equality, .