Answer:
Step-by-step explanation:
Answer:
a. 121
b.2
Step-by-step explanation:
a.
33/3×11>11
11×11>11
121>11
b.
5×2/8<5
10/8<5
1.25<5
Answer:
-4
Step-by-step explanation:
Look at the picture.
ΔABC and ΔDAC are similar. Therefore the sides of the triangles are in proportion:
AC = x
BC = 5 + 4 = 9
DC = 4
Substitute:
<em>cross multiply</em>
If you have an eye for geometry you can see that each shape has the dimensions x by 3x.
Thus, (3 blocks)(3x per block) comes out to 9x=16.2 cm = length of rectangle.
If this is true, then x = 1.8 cm
Then the area of the rect. is (width)(length) = (9 cm)(16.2 cm) = 145.8 cm^2.
Algebraically, 5(1.8 cm)(16.2 cm) = 145.8 cm^2 (answer)
