From d5b6b11415331346d86c47d81ed40e01d41c1caa Mon Sep 17 00:00:00 2001
From: chlodav <153681219+chlodav@users.noreply.github.com>
Date: Sat, 23 May 2026 22:21:32 +0300
Subject: [PATCH 1/2] add task solution

---
 src/figuresClasses.ts | 100 +++++++++++++++++++++++++++++++++++++++---
 1 file changed, 94 insertions(+), 6 deletions(-)

diff --git a/src/figuresClasses.ts b/src/figuresClasses.ts
index 753711299..0fa9c2042 100644
--- a/src/figuresClasses.ts
+++ b/src/figuresClasses.ts
@@ -1,11 +1,99 @@
-export interface Figure {}
+export type FigureColor = 'red' | 'green' | 'blue';
 
-export class Triangle implements Figure {}
+export interface Figure {
+  shape: 'triangle' | 'circle' | 'rectangle';
+  color: FigureColor;
+  getArea(): number;
+}
+
+function validatePositiveLength(value: number, name: string): void {
+  if (value <= 0) {
+    throw new Error(`${name} must be greater than 0`);
+  }
+}
+
+export class Triangle implements Figure {
+  shape: 'triangle' = 'triangle';
+
+  color: FigureColor;
+
+  a: number;
+
+  b: number;
+
+  c: number;
+
+  constructor(color: FigureColor, a: number, b: number, c: number) {
+    validatePositiveLength(a, 'a');
+    validatePositiveLength(b, 'b');
+    validatePositiveLength(c, 'c');
+
+    const sortedSides = [a, b, c].sort((x, y) => y - x);
+    const longestSide = sortedSides[0];
+    const sumOfOtherSides = sortedSides[1] + sortedSides[2];
+
+    if (longestSide >= sumOfOtherSides) {
+      throw new Error(`Sides ${a}, ${b} and ${c} can't form a triangle`);
+    }
+
+    this.color = color;
+    this.a = a;
+    this.b = b;
+    this.c = c;
+  }
+
+  getArea(): number {
+    const s = (this.a + this.b + this.c) / 2;
+    const area = Math.sqrt(s * (s - this.a) * (s - this.b) * (s - this.c));
+
+    return Math.floor(area * 100) / 100;
+  }
+}
 
-export class Circle implements Figure {}
+export class Circle implements Figure {
+  shape: 'circle' = 'circle';
 
-export class Rectangle implements Figure {}
+  color: FigureColor;
+
+  radius: number;
+
+  constructor(color: FigureColor, radius: number) {
+    validatePositiveLength(radius, 'radius');
+
+    this.color = color;
+    this.radius = radius;
+  }
+
+  getArea(): number {
+    const area = Math.PI * this.radius * this.radius;
+
+    return Math.floor(area * 100) / 100;
+  }
+}
+
+export class Rectangle implements Figure {
+  shape: 'rectangle' = 'rectangle';
+
+  color: FigureColor;
+
+  width: number;
+
+  height: number;
+
+  constructor(color: FigureColor, width: number, height: number) {
+    validatePositiveLength(width, 'width');
+    validatePositiveLength(height, 'height');
+
+    this.color = color;
+    this.width = width;
+    this.height = height;
+  }
+
+  getArea(): number {
+    return Math.floor(this.width * this.height * 100) / 100;
+  }
+}
 
-export function getInfo(figure): string {
-  return typeof figure;
+export function getInfo(figure: Figure): string {
+  return `A ${figure.color} ${figure.shape} - ${figure.getArea()}`;
 }

From 71e87629c27fcee76d730a311bb50d5b574d2ac9 Mon Sep 17 00:00:00 2001
From: chlodav <153681219+chlodav@users.noreply.github.com>
Date: Sat, 23 May 2026 22:26:24 +0300
Subject: [PATCH 2/2] add task solution

---
 src/figuresClasses.ts | 48 ++++++++++++++-----------------------------
 1 file changed, 15 insertions(+), 33 deletions(-)

diff --git a/src/figuresClasses.ts b/src/figuresClasses.ts
index 0fa9c2042..7956f26d4 100644
--- a/src/figuresClasses.ts
+++ b/src/figuresClasses.ts
@@ -15,15 +15,12 @@ function validatePositiveLength(value: number, name: string): void {
 export class Triangle implements Figure {
   shape: 'triangle' = 'triangle';
 
-  color: FigureColor;
-
-  a: number;
-
-  b: number;
-
-  c: number;
-
-  constructor(color: FigureColor, a: number, b: number, c: number) {
+  constructor(
+    public color: FigureColor,
+    public a: number,
+    public b: number,
+    public c: number,
+  ) {
     validatePositiveLength(a, 'a');
     validatePositiveLength(b, 'b');
     validatePositiveLength(c, 'c');
@@ -35,11 +32,6 @@ export class Triangle implements Figure {
     if (longestSide >= sumOfOtherSides) {
       throw new Error(`Sides ${a}, ${b} and ${c} can't form a triangle`);
     }
-
-    this.color = color;
-    this.a = a;
-    this.b = b;
-    this.c = c;
   }
 
   getArea(): number {
@@ -53,15 +45,11 @@ export class Triangle implements Figure {
 export class Circle implements Figure {
   shape: 'circle' = 'circle';
 
-  color: FigureColor;
-
-  radius: number;
-
-  constructor(color: FigureColor, radius: number) {
+  constructor(
+    public color: FigureColor,
+    public radius: number,
+  ) {
     validatePositiveLength(radius, 'radius');
-
-    this.color = color;
-    this.radius = radius;
   }
 
   getArea(): number {
@@ -74,19 +62,13 @@ export class Circle implements Figure {
 export class Rectangle implements Figure {
   shape: 'rectangle' = 'rectangle';
 
-  color: FigureColor;
-
-  width: number;
-
-  height: number;
-
-  constructor(color: FigureColor, width: number, height: number) {
+  constructor(
+    public color: FigureColor,
+    public width: number,
+    public height: number,
+  ) {
     validatePositiveLength(width, 'width');
     validatePositiveLength(height, 'height');
-
-    this.color = color;
-    this.width = width;
-    this.height = height;
   }
 
   getArea(): number {