Area formula of isosceles right triangle

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• 1. It is known that the waist of an isosceles right triangle is 2m. How to find the height and the bottom and what formula to use
• 2. An isosceles right triangle, the bottom is 10cm, find its area
• 3. The spelling of two congruent right triangles into a convex quadrilateral I'll just ask how many spellings there are. Don't ignore me
• 4. A piece of square red paper, 77 cm long, can be made into a right triangle with a bottom of 15 cm and a height of 12 cm
• 5. If the three sides of a right triangle a, B and C are equal ratio and C is hypotenuse, then Sina =?
• 6. In a right triangle, the two right sides are usually a and B, the length of the hypotenuse is C, and the height of the hypotenuse is h
• 7. The wire of length a is folded into a rectangle, the analytic expression of rectangular area y with respect to side length x is obtained, and the domain of definition and value of this function are written out Domain I know, mainly for the range
• 8. The wire of length a is folded into a rectangle, the analytic expression of rectangular area y with respect to side length x is obtained, and the domain of definition of this function is written out If the length of one side is x, the length of the other side is (a-2x) / 2 So the area is y = x (a-2x) / 2 What is the definition field (0, a / 2)? If the side length is equal to 0, then the area is equal to 0, OK
• 9. The 80 cm long iron wire forms a rectangular frame, so that one side of the rectangle is x long and the area is y. find the functional relationship between Y and X and determine the definition
• 10. Find the relation of quadratic function satisfying the following conditions: the image passes through a (- 1,3) B (1,3) C (2,6) It's better to use a variety of methods. I'm in a hurry,
• 11. In a right triangle, if the hypotenuse is 12cm long, what is its area?
• 12. The bottom of an isosceles right triangle is 10cm. What is its area in cm2?
• 13. If the length of the opposite side of a 45 degree angle in a right triangle is 1, then the length of the adjacent side is - and the length of the hypotenuse is -, so sin 45 = -, cos 45 = -
• 14. Given that the hypotenuse of an isosceles right triangle is x, find the analytic formula and the maximum value of area y and X
• 15. Given that the area of right triangle is 24 square centimeter, what is the functional relationship between Y and X? Combined with the actual situation, write out the value range of independent variable x The relation is y = 48 / X. I know. What's the range of values? X > 0? And when x=_____ The right triangle is an isosceles right triangle.
• 16. It is known that the area of right angle △ ABC is y, ab ⊥ AC, and ab = X-1, AC = x + 1. Find the analytic expression of function of Y with respect to X and the domain of definition of function
• 17. In the right triangle ABC, ∠ C = 90 °, given a + B = 14, C = 10, find the right side length
• 18. In the right triangle ABC, the angle c = 90 degrees, the angle a = 60 degrees, a, B, C are the lengths of three sides and a + B = 1, find a, B, C
• 19. In square ABCD, e is any point on CD, connecting be, taking be as hypotenuse, making isosceles right triangle bef inside the square, connecting AF Verify de = root 2AF
• 20. Given the square ABCD and the isosceles right triangle bef, place the point F on BC according to figure 1, take the midpoint g of DF, and connect eg and CG (1) Explore the quantitative relationship between eg and CG, and explain the reason; (2) turn △ bef in figure ① clockwise 45 ° around point B to get figure; (2) connect DF, take the midpoint g of DF, and ask whether the conclusion in (1) is valid, and explain the reason; (3) turn △ bef in figure ① at any angle around point B (the rotation angle is between 0 ° and 90 °) to get figure; (3) connect DF, take the midpoint g of DF, and ask the knot in (1) On whether it is tenable, please give reasons