Question

Anja is creating a triangle using three straws. The two shorter straws have lengths of 20 cm and 21 cm. How long, in centimeters, should the third straw be for Anja to create a right triangle?

Answer 1

Answer:

29 cm

Step-by-step explanation:

A²+B²=C²

20²+21²=C²

400+441=C²

841=C²

√841=C²

29=C

The length of the other side would be 29

It is given in the question that,

Anja is creating a triangle using three straws. The two shorter straws have lengths of 20 cm and 21 cm. How long, in centimeters.

Let the third side, which is the hypotenuse is c.

Now we use the pythagorean identity, which is

a2+b2=c2a2+b2=c2

where a and b are the legs.

Substituting the given values of the two legs, we will get

202+212=c2400+441=c2c2=841c=√841c=29cm202+212=c2400+441=c2c2=841c=841c=29cm

So the length of third side have to be 29 cm.

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Answer 2

Answer:

The guy up above is correct.

Step-by-step explanation: