GEOMETRICAL DRAWINGGEOMETRICAL DRAWING

CHAPTER 1 : GEOMETRY – CIRCLES

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1. Figure 1 shows a circle. Determine the center of the circle

FIGURE 1

D

A

B

C

O

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2. Figure 2 shows an arc. Determine the center of the arc.

CHAPTER 1 : GEOMETRY – CIRCLES

FIGURE 2

A

B

C

D

O

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

A

B

C

O

CHAPTER 1 : GEOMETRY – CIRCLES

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4. Figure 3 shows a triangle ABC. Construct a circumscribed circle of triangle ABC.

FIGURE 3

A

B

C

O

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

FIGURE 4

A B

C

O

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

FIGURE 5A B

C

O

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

A

B

C

O

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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.

FIGURE 7

AD

B

Semi circle

CC

B

A

D

O

O1 O1

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CHAPTER 1 : GEOMETRY – CIRCLES

FIGURE 7

Semi circle

ED

C

A

B

x

O1

C

E

A

B

D

O O1

9. 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.

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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.

A

B

C

D

E

Semi circle

O1

FIGURE 8

B

CO

D

E

A

O1

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CHAPTER 1 : GEOMETRY – CIRCLES

D

A

C

B

Semi circle

O1

FIGURE 9

O1

A

B

C

D

O

11. Redraw the template shown in Figure 9, using geometrical techniques. The new line of points A and B are as shown.