Identify the parts of a circle, including chords and radii, based on a given diagram.

Here are the solutions to the questions: 45. What does letter T represent? Step 1: Analyze the diagram. Letter T represents a line segment connecting two points on the circumference of the circle. This line segment does not pass through the center O. Step 2: Recall definitions of circle parts. • A radius is a line segment from the center to a point on the circumference. • A sector is a region bounded by two radii and an arc. • A diameter is a chord that passes through the center. • A chord is a line segment connecting two points on the circumference. • An arc is a part of the circumference. Step 3: Identify T. Based on the definition, T is a chord. The final answer is d) Chord 46. Which of the letters represent a radius? Step 1: Analyze the diagram. The center of the circle is O. A radius is a line segment from the center to any point on the circumference. Step 2: Evaluate the options. • R is a point on the circumference, and the line segment from O to R is a radius. • T is a chord. • P is part of a segment. • S is a point on the circumference, and the line segment from O to S is a radius. Step 3: Check the given options. Option (a) R refers to the point R, and the line segment OR is a radius. Option (e) S refers to the point S, and the line segment OS is a radius. Since R is given as an option, we select it. The final answer is a) R 47. The major difference between rubber and plastic is that rubber is Step 1: Consider the general properties of rubber and plastic. Rubber is known for its high elasticity, meaning it can be stretched significantly and return to its original shape. Plastics vary widely in properties, but generally, rubber exhibits greater elasticity compared to most common plastics. Step 2: Evaluate the options. • a) difficult to obtain: Not a defining major difference. • b) more delicate: Rubber is often tough and durable, not necessarily more delicate. • c) tougher: While some rubbers are tough, elasticity is a more defining characteristic. • d) harder: Rubber is generally softer than many plastics. • e) more elastic: This is a key distinguishing property of rubber. The final answer is e) more elastic. 48. Metals that contain iron are called Step 1: Recall the classification of metals based on iron content. Metals are broadly classified into two categories based on whether they contain iron. Step 2: Define the terms. • Ferrous metals are metals that contain iron. Examples include steel and cast iron. • Non-ferrous metals are metals that do not contain iron. Examples include aluminum, copper, and brass. • Coloured metals is not a standard classification based on iron content. • Alloys are mixtures of two or more metals, or a metal and another element. Some alloys contain iron (e.g., steel), others do not (e.g., bronze). • Alum is a specific type of chemical compound, not a general classification for metals. The final answer is a) ferrous metals 49. How many faces has the box? Step 1: Identify the shape. The diagram shows a rectangular prism, commonly referred to as a box. Step 2: Count the faces of a rectangular prism. A rectangular prism has: • A top face • A bottom face • A front face • A back face • A left side face • A right side face Total number of faces = 6. The final answer is d) 6 50. How many edges are there? Step 1: Identify the shape. The diagram shows a rectangular prism. Step 2: Count the edges of a rectangular prism. • There are 4 edges on the top rectangular face. • There are 4 edges on the bottom rectangular face. • There are 4 vertical edges connecting the corresponding corners of the top and bottom faces. Total number of edges = 4 + 4 + 4 = 12. The final answer is e) 12