both sides 15cm one side 2.5cm triangle how do i measure the angles

Question

if both sides of triange 15cm and one side is 2.5 cm  how do i calculate the angle.what would be the answer

Answer 1

if 2 sides av triangel the same, its isosales triangel

sound like bas=2.5 & 2 equal side=15...tall point, like speer hed

Yu draw vertikal line from mid av base up tu point=rite triangel

1 side=2.5/2=1.25, other side=15=diagonal

get hite from 15^2 -1.25^2

15^2=225, 1.25^2=1.5625; differ=223.4375

Hite=14.9478

Yu kan get base angel=invers tangent 14.9478/1.25 (=11.9583)

85.22 deg

Both bas angels the same

So top angel=180-170.44=10deg