The OK beam divides the right angle DOS into two angles so that the DOK angle is 0.7

The OK beam divides the right angle DOS into two angles so that the DOK angle is 0.7 of the DOS angle. Find the degree measure of the KOS angle.

Let’s solve this task by actions with explanations.
1) 90 * 0.7 = 63 degrees – the degree measure of the DOK angle, since this angle is 0.7 of the DOS angle, and the DOS angle is 90 degrees;
2) 90 – 63 = 27 degrees – the degree measure of the KOS angle, since the OK ray angle divides the right angle DOS into two angles DOK and DOS. and the DOS angle = 90 degrees, to the DOK angle = 63 degrees.
Answer: the degree measure of the angle KOS = 27 degrees.