How many degrees are there in.
(i) one right angle? (ii) two right angles ?
(iii) three right angles ? (iv) four right angles ?
(v) `2/3` right angle ? (vi) `1 1/2` right angles ?

Answer

Let's solve the question step by step:

### Step 1: Understanding Right Angles
A right angle is defined as an angle that measures 90 degrees.

### Step 2: Calculate Each Part

**(i) One right angle:**
- 1 right angle = 90 degrees

**(ii) Two right angles:**
- 2 right angles = 90 degrees + 90 degrees = 180 degrees

**(iii) Three right angles:**
- 3 right angles = 90 degrees + 90 degrees + 90 degrees = 270 degrees

**(iv) Four right angles:**
- 4 right angles = 90 degrees + 90 degrees + 90 degrees + 90 degrees = 360 degrees

**(v) Two-thirds of a right angle:**
- 2/3 right angle = (2/3) × 90 degrees = 60 degrees

**(vi) One and a half right angles:**
- 1 1/2 right angles = (3/2) × 90 degrees = 135 degrees

### Summary of Answers:
- (i) 90 degrees
- (ii) 180 degrees
- (iii) 270 degrees
- (iv) 360 degrees
- (v) 60 degrees
- (vi) 135 degrees

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