What is the length of the unknown side of the right triangle? ( 20

2) 29

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to Right

Equality Properties

Trigonometry

[Right Triangle Only] Pythagorean Theorem: a² + b² = c²

Step-by-step explanation:

Step 1: Define

We have a right triangle. We can use PT to find the missing length.

Step 2: Identify Variables

Leg a = 20

Leg b = 21

Hypotenuse c = x

Step 3: Solve for x

Substitute:                    20² + 21² = x²Exponents:                   400 + 441 = x²Add:                              841 = x²Isolate x:                       29 = xRewrite:                        x = 29

The answer would be b ! explanation: the formula for sa *surface area * is 2×l×w+2×l×h+2×w×h so in this case l=4w=12h=8so you use the formula to solve it and it give you the answer of 352^cm^2