Question

pllllllllllzzzzzzzzzz heeeelllllllllppppppp

Answer 1

as its a isosceles triangle Base angles are equal

• AB=AC

$\\ \rm\Rrightarrow m<A=m<C$

$\\ \rm\Rrightarrow m<C=70°$

Now using angle sum property

$\\ \rm\longmapsto m<A+m<B+m<C=180$

$\\ \rm\longmapsto 70+70+m<B=180$

$\\ \rm\longmapsto m<B+140=180$

$\\ \rm\longmapsto m<B=180-140$

$\\ \rm\longmapsto m<B=40$

Answer 2

Answer:

B

Step-by-step explanation:

Since the triangle is isosceles then the 2 base angles are congruent, that is

∠ A = ∠ C = 70° , then

∠ B = 180° - (70 + 70)° = 180° - 140° = 40° → B