Answer:
16cm, 37mm
Step-by-step explanation:
For number 11, the shape on the left is a square. This means all the sides are equal length, so the side shared with the triangle is also 12 cm. Using the pythagorean theorem, you will figure out that the unknown side is 16 (this is also another ratio of a 3-4-5 triangle).
For number 12, the side shared with the larger triangle must be 12 mm because of the pythagorean theorem once again (a^2+b^2=c^2). Then, you must use that same formula again to solve for x which is the hypotenuse. This turns out to be 37mm.
Side note**
in the pythagorean theorem, the c value is the hypotenuse and the a and b values are the legs of the triangle. it is probably best to use a calculator since you will be dealing with square roots.
