WebQuestion 1: The triangle below has a base of 11.5 11.5 cm and a perpendicular height of 12 12 cm. Calculate its area. [2 marks] Level 4-5 GCSE KS3. Question 2: Below is a trapezium with sides of length 8 8 cm, 5 5 cm, and 5 5 cm as shown below. Calculate the perpendicular height and use it to find the total area. WebExample 1: calculating the area of the circle given the radius. Find the radius of the circle. The radius is given in the question. Radius = 7cm = 7cm. 2 Use the formula \bf {\pi r^2} πr2 to calculate the area of the circle.
Tangent of a Circle - GCSE Maths - Steps, Examples & Worksheet
WebExample 1: standard diagram. Points A A, B B, and C C are on the circumference of a circle with centre O O. DE DE is a tangent at point A A. Calculate the size of angle BAD B AD. Locate the key parts of the circle for the theorem. Here we have: The angle BCA=52°. B C A = 52 ° BCA = 52°. BC A = 52°. WebA combination of a 180° rotation about a centre and an enlargement of scale factor k about the same centre is the same as a single enlargement. This enlargement would have the same centre but the scale factor would be -k. The order of the combination can be important to the overall effect. A reflection in the line y = x followed by a ... phil winstanley
Circumference of a circle - Circles, sectors and arcs - BBC
WebGCSE (1 – 9) Area and Circumference of Circles Name: _____ Instructions • Use black ink or ball-point pen. • Answer all Questions. • Answer the Questions in the spaces provided – there may be more space than you need. • Diagrams are NOT accurately drawn, unless otherwise indicated. • You must show all your working out. WebExample 6: perimeter of a right triangle. The sides of a right-angled triangle are in the ratio 3:4:5. 3: 4: 5. The perimeter is 240 \ cm. 240 cm. Calculate the length of the hypotenuse. Locate known angles, including the right angle, and calculate any necessary unknown angles. Show step. WebArea = 32π cm2. The perimeter of the semicircle is made up of both the arc of the circle (half of the circumference) and the diameter of the semicircle. Find the full length of the circumference of the circle using the formula (or ). Substitute the radius = 8 cm into the formula. Again, leave your answer in terms of . philwin sign in