139
Question 1
. What is the value of the angle BAC?
Answer:
______.
Question 2.
What is the magnitude of the angle ABC?
Answer: ______.
Question 3.
What is the value of the external angle at vertex B?
Answer: ______.
Question 4:
What is the value of the external angle at vertex C?
Answer: _____.
Task 12 Square shapes
Figure 1 is given a figure.
Figure 1
Question 1.
If the radius of the smaller circle is 2 cm,
larger area of a circle
larger than the area to 5
π smaller circle, a rectangle 40 cm long and the width of the
rectangle is 8 cm less than its length, which is the area of the shaded figure?
Answer: ______.
Question 2
. If the area of the smaller circle
π cm2, the radius of the larger circle
is 3 cm larger than the radius
the smaller the circle, the rectangle width 55 cm, and
the length of the rectangle is 5 cm more than its width, then
what is the area of the
shaded figure?
Answer:
______.
Task 13 Square shapes
Figure 2 is given a figure.
Figure 2
140
Question 1
. If the radius of a circle of 2.5 cm, 0.5 cm length of the rectangle on
the lower range of the radius and width of the rectangle of 0.7 cm less than the length,
which is the area of the shaded figure?
Answer: ______.
Question 2.
If the rectangle width 1.4 cm, length of a rectangle 3.8 cm greater
than its width, and the circle radius of 0.8 times the length of the rectangle, then what
is the area of the shaded figure?
Answer:______.
Достарыңызбен бөлісу: 
