An angle whose vertex is at the center of a circle is a central angle of that circle a) true b) false

4 and 5)16.97 or 12√2

6)15.59 or 9√3

7)y = 15.59 or 9√3     x =27

8)17.80

35x 3= 105

step-by-step explanation:

35+35= 70   70 + 35= 105

can someone me: the midsegment through the legs of an isosceles triangle is 4 in. find the sides of the triangle if its perimeter is 20 in. ,   and point g is the centroid of the right △abc with hypotenuse ab=18 in. find cg.