Question

What the answer for Q 1 and 2

Answer 1

Answer:

yung 70

Step-by-step explanation:

i hope its help

carry on learning

Answer 2

Figure 1.

we know that, sum of all interior angles of a triangle is 180°

so, let's assume the last angle be x

now, we now that,

=》

$x + 60 + 60 = 180$

=》

$x + 120 = 180$

$x = 180 - 120$

=》

$x = 60$

value of missing angle is 60°, so each angle of the triangle measures 60° , hence the given triangle is an equilateral triangle ,

hence, each side measures same,

that's why BC = 9 units

Figure 2

in the given figure two sides of the triangle is equal, so their opposite angles will be equal,

let each angle be n

we know, sum of all interior angles of a triangle measures 180°

So,

=》

$n + n + 70 = 180$

=》

$2n + 70 = 180$

=》

$2n = 180 - 70$

=》

$2n = 110$

=》

$n = \frac{110}{2}$

=》

$n = 55$

hence, value of Angle RST = n = 55°