Answer:
7 slides
Step-by-step explanation:
Sum of exterior angles of any polygon is always 360∘, it can never be 900∘. Hence, there cannot be any polygon like this.
It appears that by error the word "exterior" has been mentioned. In case sum of interior angles is 900∘,
total sum of all the angles is 900∘+360∘=1260∘.
But sum of each pair of interior and exterior angles add up to 180∘
we have 1260∘180∘=7 such pairs
and hence polygon has 7 sides.
Answer:

Step-by-step explanation:

Answer:
277.47cm
Step-by-step explanation:
Basically the first thing you're going to have to do is move the y's to one side of the equal sign. To do this you can either add 0.3y to both sides of the equation OR subtract 0.7y from both sides of the equation.
Answer:
x=70
Step-by-step explanation:
angle FED and GEC are vertical angles so they both equal 50
angle DEB and CEA are also vertical angles so they both equal 20
50+20=70