r = 0.1389 cm
Each edge will be 5 cm so: 0.5*5*5*sin(60 degrees)*5 = 54.127 cubic cm to 3 d.p.
The 5 sided regular pentagon will consist of 5 congruent isosceles angles with equal sides of 6.379881063 cm by using the sine rule and 2 equal base angles of 54 degrees with an apex angle of 72 degrees opposite side 7.5 cm Area of the pentagon: 0.5*6.379881063^2 *sin(72)*5 = 96.77685379 square cm
Using the cosine rule they are 28.96 degrees, 104.47 degrees and 46.57 degrees which all add up to 180 degrees.
Using the sine rule the possibilities are: 25 degrees, 28.93 degrees, 126.07 degrees with a 3rd side of 58.15 cm or 25 degrees, 151.07 degrees, 3.93 degrees with a 3rd side of 4.93 cm
It is a fall of approx 21 cm.
r = 0.1389 cm
It's not a circle if it's radius of 5 degrees. If it's 5 cm radius, then 12 circles.
If you mean quadrilateral ABCD then by using Pythagoras' theorem diagonal AC is 5 cm and using the cosine rule angle ADC works out as 41.04 degrees.
Each edge will be 5 cm so: 0.5*5*5*sin(60 degrees)*5 = 54.127 cubic cm to 3 d.p.
It is an octagon each of whose sides is 5 cm long and each of whose interior angles measures 135 degrees.
Using the cosine rule they are 73.37 degrees, 62.19 degrees and 44.44 degrees which all add up to 180 degrees
Using the cosine rule they are 28.96 degrees, 104.47 degrees and 46.57 degrees which all add up to 180 degrees.
The 5 sided regular pentagon will consist of 5 congruent isosceles angles with equal sides of 6.379881063 cm by using the sine rule and 2 equal base angles of 54 degrees with an apex angle of 72 degrees opposite side 7.5 cm Area of the pentagon: 0.5*6.379881063^2 *sin(72)*5 = 96.77685379 square cm
Using the sine rule the possibilities are: 25 degrees, 28.93 degrees, 126.07 degrees with a 3rd side of 58.15 cm or 25 degrees, 151.07 degrees, 3.93 degrees with a 3rd side of 4.93 cm
neither, the water is not frozen at either temp
Using the cosine rule the angles of the triangle are 28.96 degrees, 46.57 degrees and 104.47 degrees that all add up to 180 degrees.