Basic Geometrical Ideas
Exercise 4.4
Examples for Practice
1). Draw a rough sketch of a triangle ABC. Mark a point P in its interior and a point Q in its exterior. Is the point A in its exterior or in its interior?
Point A is neither in the exterior nor in the interior, it is on the triangle ABC.
2).
a). Identify three triangles in the figure.
∆ABC, ∆ABD, ∆ADC.
b). Write the names of seven angles.
∟ABD, ∟ADB, ∟ADC, ∟ACB, ∟CAD, ∟BAD, ∟BAC
c). Write the names of six line segments.
AB, AC, AD, BD, CD, BC
d). Which two triangles have ∟B as common?
∆ABC and ∆ABD have ∟B as common.
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Chapter 4 Basic Geometrical Ideas
Chapter 3: Playing With Numbers
Chapter 2: Whole Numbers
Chapter 2: Knowing Our Numbers
