Question

In triangle ABC, IfAB=BC and angle B=70, angle A will be ​

Answer 1

$\huge\mathfrak\pink{♡αɳรωεɾ♡}$

${⇒}$$\sf{since, AB=BC}$

${⇒}$$\sf{angle A = angle C}$

${⇒}$$\sf{let ~angle ~A = x}$

${⇒}$$\sf{So, angle ~C~ is ~also~ equal~ to~ x}$

${⇒}$$\sf{angle ~A + ~ B + angle~ C = 180 °~2x + 70 = 180 °}$

${⇒}$$\sf{x =}$$\frac{ (180-70)}{2}$

${⇒}$$\sf{ = 55 °}$

Answer 2

Step-by-step explanation:

given,

AB=BC then,

Angle A=Angle C[angle opposite to equal side are always equal]

angle B=70

(A+C)+B=180

(A+A)+70=180[A=C]

2A+70=180

2A=180-70

2A=110

A=55