Question

class 7 triangles exercise 7.1,7.2,7.3​

Answer 1

Exercise 7.1

1). i). R

ii). PR

iii). Angle P

iv). PQ

2). in book

3). i). Altitude

ii). Median

iii). No

4). No, Here you can see that the median (perpendicular) is lying in the exterior of a triangle. this is an obtuse angle triangle.

5). yes, of a right angled triangle.

Here, we can see that BC and AB are themselves the two altitudes of the triangle.

6). i). ABC

ii). PQR

iii). XYZ

7). consider the equalateral triangle pqr .pq, qn, pm are altitude of tri. the altitude of an equilateral triangle does the shape into equal parts. Hence attitude also medium of the triangle.

Exercise : 7.2

1). i). 110°

ii). 95°

iii). 100°

2). i). 65°

ii) 50°

iii). 34°

3). i). 35°

ii). 25°

iii). 180°

4). i). 65°

ii). 50°

iii). 30°

5).

1. x = 70, y=60
2. y = 80, x = 60
3. y = 90, x = 45

7).

1. x = 45
2. y = 20°
3. 95°

8). a). x = 80 , y = 35, z= 10

10). 50,50

11). 48,72

12). 60,90