Question

The diagram shows an isosceles triangle. All the measurements are in cm. Work out the perimeter of the triangle.

How do I achieve the other 3 marks (putting what shows in the box got me 1/4 marks)? Putting "cm" after the numbers did nothing.

Answer 1

The final mark you can get by substitute the 6 to the x which you get the total of 38 because you have to calculate the perimeter of the isosceles triangle. You both literally helped me to get the full marks on Mathswatch Thank you!

Answer 2

check the picture below.

therefore, the perimeter is then -> [3(6) - 5] + [ 19 - (6)] + [ 2(6) ].