One leg of a right triangle is 21 centimeters long. The hypotenuse of the triangle is 29 centimeters long. What is the length of the unknown leg?

20 cm

Step-by-step explanation:

A2 + B2 = C2

 C is your hypotenuses = 29 cm

And one leg of a right triangle is 21 cm long

So we have A2 = (21cm)2 = 441 cm + B2 = (29cm)2 = 841cm

B2 = 841 - 441 = 400

 B = √400 = 20

So the third leg of a triangle that has a hypotenuses of 29 cm and one side of a right triangle that is 21 cm long is 20 cm

560

hope this : )

explanation:

infrared radiation has wavelength in the range between 700 nm and 1 mm. lets' convert these values into scientific notation, keeping in mind that:

let's start from the lower value, we have:

(we moved the dot two places to the left, so we increased the exponent by 2 units, from -9 to -7)

the higher value is:

so, the range of wavelength of infrared radiation is: