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vertical angles
5
-5
When two sides of a right triangle are 6 and 8, the triangle is similar to a 3-4-5 right triangle. Since 6 is twice 3 and 8 is twice 4, the hypotenuse has to be twice 5 or 10.
There are two angles between 5 and 8 on a clock face. The smaller (right) angle is 90 degrees. The larger (reflex) angle is 270 degrees.
It is a obtuse angle.
Infinit
240 degrees - 30 degrees for each hour on the clock
As one angle increases, its counterpart on the clock decreases. The acute angle is greater at 8 o'clock but the reflex angle is greater at 10 o'clock.
The angle between the minute- and hour-handson an 'analog' clock at 8:45 is 7.5 degrees.
obtuse
11 Two right angles are formed during each hourly period 4-5, 5-6, 6-7, 7-8, 8-9. However, when the clock reaches 9pm, this coincides with the second 90° between the hours of 8-9. The clock has then to reach approximately 9.34pm for the only occasion when the hands will be at 90° in the hour 9-10.
75o Between each digit on the clock face, there are 360o ÷ 12 = 30o. At 8:30, the big hand is pointing to the 6 and the little hand is half way between the 8 and the 9 which means there are 21/2 digits between them. Which in degrees is: 21/2 x 30o = 75o
Usually people say 5 to 8 - not 5 to 8 o'clock and NOT 5 of 8 o'clock. More common is digital format e.g 7:50
There are 360 degrees from 12 to 12 , so every hour is 360/12 = 30 degrees. From 12 to 8 there is 30 x 8 = 240 degrees
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