Q78Multiple choice
Draw all the diagonals of a pentagon ABCDE and name them. Activity 1: Observe questions 65 to 72. Can you find out the number of line segments, when the number of points marked on line segment is 7?, 9?, 10?. Activity 2: Copy the equilateral ∆ABC shown in Fig. 2.49 on your notebook.
This question refers to a figure in the original PDF.
- (a)Take a point P as shown in the figure.
- (b)Draw PD ⊥ BC , PE ⊥ CA and PF ⊥ AB
- (c)Also, draw AK ⊥ BC B KD C Fig. 2.49 Now, draw a line l, measure PD using a divider and ruler and mark it on line l as shown Fig. 2. 50. Fig. 2.50 Again measure PE with divider and mark it on the line l as DE (say). Again measure PF with divider and mark it on line l next to E as EF. 11.4.2018 Now check whether the length of AK and the length (PD + DE + EF) are the same! Activity 3: Copy the isosceles triangle ABC shown in Fig. 2.51 on your notebook. Take a point E on BC and draw EF ⊥ CA and EG ⊥ AB. Measure EF and EG and add them. Draw AD ⊥ BC . A Check whether the sum of EF and EG is equal to AD with the help of ruler or with the help of divider. B D E C Fig. 2.51 11.4.2018 MATHEMATICS Rough Work GEOMETRY 39 11.4.2018 UNIT-2 Rough Work 11.4.2018
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(a) Take a point P as shown in the figure.
(b) Draw PD ⊥ BC , PE ⊥ CA and PF ⊥ AB