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840.1. Triangle angle sum, straight angle cathetus, hypotenuse, Right-angled triangle similarity signs.

Write the answer!

2 rectangular triangles angles are given. Calculate the third angle!
90° and 86°
°
Grade:
7
Subject
Geometry
Theme
Triangle angles sum. Right-angled triangle similarity signs.
Subtheme
Triangle angle sum, straight angle cathetus, hypotenuse, Right-angled triangle similarity signs.

Solve tasks to find hidden Geo point coordinates

  1. Algebra: Coordinate beginning point
  2. Geometry: Narrow, wide, straight, extended, opened, full angle. Equal angles, bisector.
  3. Algebra: Numerical connections
  4. Algebra: Polynomial opposite polynomial.
  5. Geometry: Point, straight line, plane, geometric figure.
  6. Algebra: Quadrant
  7. Algebra: Conditioned inequality properties
  8. Algebra: Opposite type inequalities.
  9. Geometry: Equal triangles, appropriate elementrs, similar properties and signs.
  10. Algebra: Properties of conditional inequalities
  11. Geometry: Inner unilateral and cross angles, alternate interiour angles, parallel straight lines, properties, and parallel signs.
  12. Algebra: Mathematical expression. Algebraic expression.
  13. Algebra: Mutually equal monomials
  14. Geometry: Inner unilateral and cross angles, alternate interiour angles, parallel straight lines, properties, and parallel signs.
  15. Geometry: Circle line, center, radius, diameter, chord, curve.
  16. Algebra: Rational number
  17. Geometry: Equal figures, line segments, lengths, midpoints, distance between two points.
  18. Algebra: Subscript concept: base, index, degree
  19. Algebra: Percent and proportions
  20. Algebra: Direct proportionality concept
  21. Algebra: Coordinate plane
  22. Algebra: Monomial
  23. Algebra: Fraction (division) basic properties
  24. Algebra: Linear equations ax + b = 0, where a, b ∈ Q.
  25. Algebra: Degree with negative index
  26. Algebra: Linear inequalities ax + b > 0, where a, b ∈ Q
  27. Algebra: Concept of equation.
  28. Algebra: Polynomial.
  29. Algebra: Concept of equation.
  30. Algebra: Coordinate axis and point coordinate
  31. Algebra: Polynomial opposite polynomial.
  32. Algebra: Notation –x < 3 vai x ∈ (– ∞; 3)
  33. Geometry: Point belongs (or not) to the straight line (beam, line segment), half-plane, crossed straight lines, beam, opposite beams, line segment, properties.
  34. Algebra: Similar polynomials.
  35. Algebra: Numerical inequalities and their properties.
  36. Algebra: Letter - variable.
  37. Algebra: Mathematics expression. Algebraic expression.
  38. Algebra: Point coordinates
  39. Algebra: Equation properties.
  40. Geometry: Triangle angle sum, straight angle cathetus, hypotenuse, Right-angled triangle similarity signs.
  41. Algebra: Proportionality factor k
  42. Algebra: Point coordinates