# IGCSE Mathematics Paper-1: Specimen Questions with Answers 289 - 292 of 324

## Question number: 289

Short Answer Question▾

### Write in Short

What is the order of rotational-symmetry of an equilateral triangle?

### Explanation

We have to check, how many times an equilateral triangle fits on to itself during a full rotation of 360 degrees.

Please look at the images of the equilateral triangle in the order A, B and C.

A is the original image. The images B and C are generated by rotating the original image A.

When we look at the above images of equilateral triangle, it fits on to itself 3 times during a full rotation of 360 degrees.

Hence, an equilateral triangle has rotational symmetry of order 3.

## Question number: 290

Short Answer Question▾

### Write in Short

The path is 3.5 kilometers long and slopes at an angle of to the horizontal.

Calculate the height of the hill, showing all you’re working.

Give your answer in meters.

### Explanation

Calculate the height of the hill.

Convert km to m

## Question number: 291

Short Answer Question▾

### Write in Short

Calculate, giving your answer in standard form.

,

### Explanation

## Question number: 292

Short Answer Question▾

### Write in Short

Work out

Writing down

Your answer to two decimal places

### Explanation

Here define the two decimal place value.

Here given the

Two decimal place value is 3.57