# 57438167 Engineering Drawing Form 4 Circles

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GEOMETRICAL DRAWING

CHAPTER 1 : GEOMETRY CIRCLES1. Figure 1 shows a circle. Determine the center of the circle

A

B

O C

D FIGURE 1

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CHAPTER 1 : GEOMETRY CIRCLES2. Figure 2 shows an arc. Determine the center of the arc.

C B D

A

O

FIGURE 2

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CHAPTER 1 : GEOMETRY CIRCLES3. Construct a circle through the given point A, B and C.

C

A

O

B

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CHAPTER 1 : GEOMETRY CIRCLES4. Figure 3 shows a triangle ABC. Construct a circumscribed circle of triangle ABC.

C

A

O

FIGURE 3 B

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CHAPTER 1 : GEOMETRY CIRCLES5. Figure 4 shows a triangle ABC. Construct an external circle of the triangle.

C

O

A FIGURE 4

B

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CHAPTER 1 : GEOMETRY CIRCLES6. Figure 5 shows a triangle ABC. Construct an inscribed circle of the triangle.

C

O

A FIGURE 5

B

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CHAPTER 1 : GEOMETRY CIRCLES7. Draw a semi circle through the point A, B and C. Angle of ABC = 90o.

C

O

B

A

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CHAPTER 1 : GEOMETRY CIRCLES8. Redraw the template shown in Figure 7, using geometrical techniques. The new position of points B and C is as shown.

C B C O B O1 D

O1

A

Semi circle

DFIGURE 7

A

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CHAPTER 1 : GEOMETRY CIRCLES9. Figure 7 shows a template ABCDE. Redraw the template by using the geometrical methods. The new position of point B and point C are as shown.

B B O1Semi circle

A x

D O O1

A DFIGURE 7

E

C

C E

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CHAPTER 1 : GEOMETRY CIRCLES10. Redraw the template shown in Figure 8, using geometrical techniques. The new line of BC is as shown.

E

Semi circle

D

E D O O1 C

O1

C B

FIGURE 8A A

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CHAPTER 1 : GEOMETRY CIRCLES11. Redraw the template shown in Figure 9, using geometrical techniques. The new line of points A and B are as shown.

O1 B Semi circle D

O

C A

C A B

D

O1

FIGURE 9

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