Question

Practice set 4.2
1. Construct A PQR, in which QR = 4.2 cm, mZQ = 40° and PQ + PR = 8.5 cm
2. Construct A XYZ, in which YZ = 6 cm, XY + XZ = 9 cm. ZXYZ = 50°
3. Construct A ABC, in which BC = 6.2 cm, ZACB = 50°, AB+AC = 9.8 cm
+ Construct A ABC, in which BC = 5.2 cm, ZACB = 45° and perimeter of A ABC
is 10 cm
Construction II
To construct a triangle when its base, angle adjacent to the base and differen
between the remaining sides is given.
Ex (1) Construct A ABC, such that BC = 7.5 cm, ZABC = 40°, AB - AC = 3 cm.
Solution : Let us draw a rough figure.
Explanation : AB - AC = 3 cm .. AB > AC
Draw seg BC. We can draw the ray BL such
that LBC = 40°. We have to locate point
7.5 cm
A on ray BL. Take point D on ray BL such
that BD = 3 cm.
Rough Figure 4.5
A
B
с C​

Answer 1

Answer:

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