Answer:
m<ADB=70°
m<ADC=110°
m<DAC=45°
Step-by-step explanation:
<ADB=<ABD(being isosceles triangle: AD=AB)
<ABD+<ADB+<DAB=180°(sum of the angle of triangle is 180°)
2<ADB+40°=180°(<ADB=<ABD and <DAB=40°)
2<ADB=140°
<ADB=70°
<ADB+<ADC=180°(being straight angle)
70°+<ADC=180°
<ADC=110°
<ADC+<ACD+<DAC=180°( sum of the angle of triangle is 180°)
110°+25°+<DAC=180°
<DAC=45°
Answer:
x= -5
I hope this is the right answer. :)
Answer:

Step-by-step explanation:
The formula of a volume of a cylinder:

The formula of a volume of a cone:

r - radius, H - height
We have in
cylinder:
r = 4ft : 2 = 2ft, H = 8.5ft
cone:
r = 4ft : 2 = 2ft, H = 13 ft - 8.5ft
The volume of the silo:

Substitute:

The area of a triangle with the dimensions of 13 X 13 X 10 is 65.