@warbru@Simi_2210_ That’s fine. This is just the easy stuff. They need to show us a bit harder such as simultaneous equations or the even harder quadratics.
@x_plusprod@Simi_2210_ That’s fine. This is just easy stuff; they need to show us a bit harder like simultaneous equations and the more difficult quadratics.
@FMahersya@UchennaF28384 There is a bit of Pythagoras going on here; right angled triangle etc. The right angle is 90° & the one along the 110° line is 70° This means that the one equal & opposite to x is 20°. The angle on the line the other side of x is 160°.
@farman4x That’s easy the answer is 14. It is 5 squared - 1 which is 24. Add to that the square root of 16 which is 4 and you have 28. Then divide the 28 by the square root of 4 which is 2 and that gives you 14 which is the correct answer.
@mathtech789 Pythagoras says that the sum of the squares on each of the 2 adjacent sides are equal to the sum of the squares on the hypotenuse. So (12x12) + (5x5) =169 The square root of 169 is 13. Therefore the total length of the perimeter is (13 + 12 +5) which equals 30. QED.