# IGCSE Mathematics Paper-1: Specimen Questions with Answers 85 - 88 of 324

## Question number: 85

Essay Question▾

### Describe in Detail

Solve:

The diagram shows the route of a fishing boat. The boat sails from A to B on a bearing and then from B to C on a bearing , AB = BC.

(a) How is angle ABC = .

(b) Solve bearing of C from A.

### Explanation

Here, the boat sails from A to B on a bearing and then from B to C on a bearing , AB = BC. Let take North = N

(a) Here,

= and =

Now, DAB =

Now, DAB and will be alternate interior angles which are of same angles: .

So, =

Now,

(b) Here, as given AB = BC and .

- So, from A to C bearing will be

## Question number: 86

Essay Question▾

### Describe in Detail

Mahesh and Jayraj share in the ratio . How much does Mahesh receive?

### Explanation

Here, Total money is

Ratio of Mahesh and Jayraj’s sharing is . So, total is

So, Mahesh has and Jayraj has money.

So, Mahesh will have and Jayraj will have .

## Question number: 87

Short Answer Question▾

### Write in Short

Solve .

### Explanation

Here, equation is

## Question number: 88

Short Answer Question▾

### Write in Short

The net of a solid is drawn accurately below.

Write down the special name for

(a) The triangles shown on the net,

(b) The solid.

### Explanation

Here,

(a) The triangles shown on the net are **equilateral triangles**, because middle triangle’s edges having adjacent triangles fit with it.

- Equilateral Triangles are those which have equal length of sides.

(b) The solid of net image will called as **Regular Pyramid** or **Triangular Pyramid**.

- A regular pyramid has three equilateral triangles and three identical isosceles triangle sides.