What geometric term is represented by T in the diagram, and which letter represents a radius?

Here are the solutions to the questions: 45. What does letter T represent? Step 1: Observe the diagram. Letter T represents a line segment that connects two points on the circumference of the circle (S and P). This line segment does not pass through the center O. Step 2: Recall definitions of parts of a circle. • 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 its definition. The line segment T fits the definition of a chord. The final answer is d) Chord 46. Which of the letters represent a radius? Step 1: Observe 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 given options in relation to the center O. • The line segment from O to R (OR) is a radius. • The line segment from O to S (OS) is a radius. • T is a chord. • P is a point on the circumference, and OP would be a radius. • O is the center. Step 3: Select the option that represents a radius. Both R and S are points on the circumference, and the line segments OR and OS are radii. Since R is given as an option, it represents a point to which a radius extends from the center. 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 and deformed significantly and then return to its original shape. Plastics, while diverse, generally exhibit less elasticity compared to rubber. Step 2: Evaluate the given options. • a) difficult to obtain: Not a universal major difference. • b) more delicate: Rubber is often durable, not necessarily more delicate. • c) tougher: While some rubbers are tough, elasticity is a more fundamental distinguishing property. • d) harder: Rubber is typically softer than many plastics. • e) more elastic: This is a primary characteristic that distinguishes rubber from most plastics. 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 categorized into two groups depending on whether they contain iron. Step 2: Define the relevant terms. • Ferrous metals are metals that contain iron, such as steel and cast iron. • Non-ferrous metals are metals that do not contain iron, such as aluminum, copper, and brass. • Coloured metals is not a standard classification based on iron content. • Alloys are mixtures of metals or a metal and another element; some alloys contain iron, others do not. • Alum is a specific chemical compound, not a classification for metals. The final answer is a) ferrous metals 49. How many faces has the box? Step 1: Identify the geometric shape. The diagram shows a rectangular prism, which is commonly referred to as a box. Step 2: Count the faces of a rectangular prism. A rectangular prism has 6 faces: • Top face • Bottom face • Front face • Back face • Left side face • Right side face The final answer is d) 6 50. How many edges are there? Step 1: Identify the geometric shape. The diagram shows a rectangular prism. Step 2: Count the edges of a rectangular prism. A rectangular prism has 12 edges: • 4 edges on the top rectangular face. • 4 edges on the bottom rectangular face. • 4 vertical edges connecting the top and bottom faces. Total edges = 4 + 4 + 4 = 12. The final answer is e) 12