The measures of three angles at a point are in the ratio of 2 : 3 : 5. find the measures of the angles

Is δ pmr similar to δ smn ? if so, which postulate or theorem proves these two triangles are similar?

The difference of three and the reciprocal of a number is equal to the quotient of 20 and the number. find the number.

Apossible wavelength for the color blue is 0.000000492 meter. which of the following is a reasonable estimate for this wavelength for the color blue? a. 5 × 10-6 m b. 5 × 107 m c. 5 × 10-7 m d. 5 × 106 m